Earth and Sky:Plants vs. Insects 植物和昆虫

Plants vs. Insects 植物和昆虫

New research is shedding light on one of the longest running battles of all time -- the war between plants and insects. Plants may seem helpless, but they have complex chemical defenses. Plants vs. insects -- today on Earth and Sky.

JB: This is Earth and Sky. Plants use chemicals to repel¹ enemies -- some chemicals are toxic², others just taste bad. But plants also defend themselves in more subtle ways.

DB: A plant that produces salicylic acid -- a chemical in aspirin³ -- uses the substance to treat its own wounds -- much as humans take aspirin to stop pain. Penn State entomologist Jack⁴ Schultz has found that the plant might also use salicylic acid to wreak⁵ havoc⁶ on its enemies.

Jack Schultz: Sure, for a long time people have been taking aspirin as a medicine, but grasshoppers⁸ are getting a huge dose of this stuff when they eat plants. What does that mean to all of the signaling processes in a grasshopper⁷ that aspirin would interfere⁹ with?

JB: Schultz believes plants engage in a sort of "signal jamming" -- interfering¹⁰ with an insect's biochemistry, rendering¹¹ it less likely to inflict¹² damage. But insects can fight dirty too ...

Jack Schultz: It's sort of espionage¹³. The insect sends the plant a signal that says, "Okay, this is a microbe, not an insect, turn on your disease resistance," and essentially¹⁴ turning on the plant's resistance to disease, it also turns down the plant's resistance to insects and makes the plant more susceptible¹⁵ to the insect.

DB: For more -- come to today's show at earthsky.org. Our thanks to the National Science Foundation, where discoveries begin. We're Block and Byrd for Earth and Sky.

1 repel   

v.击退，抵制，拒绝，排斥

参考例句：

• A country must have the will to repel any invader.一个国家得有决心击退任何入侵者。
• Particles with similar electric charges repel each other.电荷同性的分子互相排斥。

2 toxic   

adj.有毒的，因中毒引起的

参考例句：

• The factory had accidentally released a quantity of toxic waste into the sea.这家工厂意外泄漏大量有毒废物到海中。
• There is a risk that toxic chemicals might be blasted into the atmosphere.爆炸后有毒化学物质可能会进入大气层。

3 aspirin   

n.阿司匹林

参考例句：

• The aspirin seems to quiet the headache.阿司匹林似乎使头痛减轻了。
• She went into a chemist's and bought some aspirin.她进了一家药店，买了些阿司匹林。

4 jack   

n.插座，千斤顶，男人；v.抬起，提醒，扛举；n.（Jake）杰克

参考例句：

• I am looking for the headphone jack.我正在找寻头戴式耳机插孔。
• He lifted the car with a jack to change the flat tyre.他用千斤顶把车顶起来换下瘪轮胎。

5 wreak   

v.发泄；报复

参考例句：

• She had a burning desire to wreak revenge.她复仇心切。
• Timid people always wreak their peevishness on the gentle.怯懦的人总是把满腹牢骚向温和的人发泄。

6 havoc   

n.大破坏，浩劫，大混乱，大杂乱

参考例句：

• The earthquake wreaked havoc on the city.地震对这个城市造成了大破坏。
• This concentration of airborne firepower wrought havoc with the enemy forces.这次机载火力的集中攻击给敌军造成很大破坏。

7 grasshopper   

n.蚱蜢，蝗虫，蚂蚱

参考例句：

• He thought he had made an end of the little grasshopper.他以为把那个小蚱蜢干掉了。
• The grasshopper could not find anything to eat.蚱蜢找不到任何吃的东西。

8 grasshoppers   

n.蚱蜢( grasshopper的名词复数 )；蝗虫；蚂蚱；（孩子）矮小的

参考例句：

• Grasshoppers die in fall. 蚱蜢在秋天死去。 来自《简明英汉词典》
• There are usually a lot of grasshoppers in the rice fields. 稻田里通常有许多蚱蜢。 来自辞典例句

9 interfere   

v.(in)干涉，干预；(with)妨碍，打扰

参考例句：

• If we interfere, it may do more harm than good.如果我们干预的话，可能弊多利少。
• When others interfere in the affair,it always makes troubles. 别人一卷入这一事件，棘手的事情就来了。

10 interfering   

adj. 妨碍的 动词interfere的现在分词

参考例句：

• He's an interfering old busybody! 他老爱管闲事！
• I wish my mother would stop interfering and let me make my own decisions. 我希望我母亲不再干预，让我自己拿主意。

11 rendering   

n.表现，描写

参考例句：

• She gave a splendid rendering of Beethoven's piano sonata.她精彩地演奏了贝多芬的钢琴奏鸣曲。
• His narrative is a super rendering of dialect speech and idiom.他的叙述是方言和土语最成功的运用。

12 inflict   

vt.(on)把…强加给，使遭受，使承担

参考例句：

• Don't inflict your ideas on me.不要把你的想法强加于我。
• Don't inflict damage on any person.不要伤害任何人。

13 espionage   

n.间谍行为，谍报活动

参考例句：

• The authorities have arrested several people suspected of espionage.官方已经逮捕了几个涉嫌从事间谍活动的人。
• Neither was there any hint of espionage in Hanley's early life.汉利的早期生活也毫无进行间谍活动的迹象。

14 essentially   

adv.本质上，实质上，基本上

参考例句：

• Really great men are essentially modest.真正的伟人大都很谦虚。
• She is an essentially selfish person.她本质上是个自私自利的人。

15 susceptible   

adj.过敏的，敏感的；易动感情的，易受感动的

参考例句：

• Children are more susceptible than adults.孩子比成人易受感动。
• We are all susceptible to advertising.我们都易受广告的影响。