Reaction
[ r?'?k??n ]
第2級(jí)
其它 Other
n. 反應(yīng);反作用力;反動(dòng);保守;
?? 詞根助記
re向后，相反+act行動(dòng)+ion名詞后綴→反動(dòng)，反應(yīng)
?? 例句
A reaction generally remains fixed in elevation even though it carries a force.
即使承受力，通常反力還是在垂直面內(nèi)維持固定不變。
In a more complex one-step reaction, bonds both form and break.
在較復(fù)雜的一步反應(yīng)里，既有化學(xué)鍵的形成，也有化學(xué)鍵的斷開(kāi)。
The overall reaction is one of substitutions.
總反應(yīng)是取代反應(yīng)中的一種。
Catalysis has increased the rate of reaction.
催化作用提高了反應(yīng)的速度。
Putting an acid and a metal together causes a reaction.
將酸和金屬放在一起會(huì)引起反應(yīng)。
?? 聯(lián)想助記
【記】action-作用,reaction-反作用:作用與反作用是相互的
? 同義詞
?? 反義詞
?? 牛津釋義
reaction
n
1 [C, U] ~ (to sb/sth) response to a situation, an act, an influence, etc （對(duì)情況、 行動(dòng)、 影響等做出的）反應(yīng), 回應(yīng)
What was his reaction to the news? 他對(duì)這消息的反應(yīng)如何?
Her arrest produced an immediate/a sudden reaction from the press. 她被捕的事立刻[突然]在新聞界引起反響.
the shocked reaction of schools to education cuts 學(xué)校對(duì)削減教育經(jīng)費(fèi)的激烈反應(yīng)
Reaction to his taunts will only encourage him. 別理會(huì)他惡言尋釁, 一理他更來(lái)勁兒.
2 [sing] physical response, usu a bad one, to a drug, chemical substance, etc （由藥物、 化學(xué)物質(zhì)等引起的）生理上的反應(yīng)（通常指不良反應(yīng)）
an allergic reaction to animals, birds, etc 對(duì)獸類、 鳥(niǎo)類等的變態(tài)反應(yīng)
I had a bad reaction after my typhoid injection. 我注射傷寒針劑後產(chǎn)生了不良反應(yīng).
3 [sing, U] return to a previous state after a period of the opposite condition 回復(fù)到原來(lái)的狀態(tài); 復(fù)舊
After all the excitement there was (an inevitable) reaction, eg a time when life seemed dull again. 熱鬧一番過(guò)後, （不可避免地）又恢復(fù)了舊觀（生活沉悶如故）.
4 [U] opposition to (esp political) progress or reform 反對(duì)（尤指政治的）進(jìn)步或改革; 反動(dòng)
The forces of reaction made reform difficult. 反動(dòng)勢(shì)力給改革造成了困難.
5 [C, U] chemical change producedby two or more substances acting upon each other 化學(xué)反應(yīng)
nuclear reaction, ie change within the nucleus of an atom 核反應(yīng).
?? 擴(kuò)展釋義
*[ri'?k??n]n. 反應(yīng), 反作用, 反動(dòng)【醫(yī)】 反應(yīng)
?? 醫(yī)學(xué)釋義
反應(yīng)，回授，（正）反饋
?? 同為「高中」詞匯
查看全部高中詞匯 ›??? 情景例句
Come on. you can do it!
來(lái)吧，你能行！
Brave actions never want a trumpet.
勇敢的行為不須要吹號(hào)。
OK. Thanks.
謝謝！