Reaction
[ rɪ'ækʃən ]
第2级
其它 Other
n. 反应;反作用力;反动;保守;
💡 词根助记
re向后，相反+act行动+ion名词后缀→反动，反应
📝 例句
A reaction generally remains fixed in elevation even though it carries a force.
即使承受力，通常反力还是在垂直面内维持固定不变。
In a more complex one-step reaction, bonds both form and break.
在较复杂的一步反应里，既有化学键的形成，也有化学键的断开。
The overall reaction is one of substitutions.
总反应是取代反应中的一种。
Catalysis has increased the rate of reaction.
催化作用提高了反应的速度。
Putting an acid and a metal together causes a reaction.
将酸和金属放在一起会引起反应。
🌱 联想助记
【记】action-作用,reaction-反作用:作用与反作用是相互的
✅ 同义词
🔴 反义词
📖 牛津释义
reaction
n
1 [C, U] ~ (to sb/sth) response to a situation, an act, an influence, etc （对情况、 行动、 影响等做出的）反应, 回应
What was his reaction to the news? 他对这消息的反应如何?
Her arrest produced an immediate/a sudden reaction from the press. 她被捕的事立刻[突然]在新闻界引起反响.
the shocked reaction of schools to education cuts 学校对削减教育经费的激烈反应
Reaction to his taunts will only encourage him. 别理会他恶言寻衅, 一理他更来劲儿.
2 [sing] physical response, usu a bad one, to a drug, chemical substance, etc （由药物、 化学物质等引起的）生理上的反应（通常指不良反应）
an allergic reaction to animals, birds, etc 对兽类、 鸟类等的变态反应
I had a bad reaction after my typhoid injection. 我注射伤寒针剂後产生了不良反应.
3 [sing, U] return to a previous state after a period of the opposite condition 回复到原来的状态; 复旧
After all the excitement there was (an inevitable) reaction, eg a time when life seemed dull again. 热闹一番过後, （不可避免地）又恢复了旧观（生活沉闷如故）.
4 [U] opposition to (esp political) progress or reform 反对（尤指政治的）进步或改革; 反动
The forces of reaction made reform difficult. 反动势力给改革造成了困难.
5 [C, U] chemical change producedby two or more substances acting upon each other 化学反应
nuclear reaction, ie change within the nucleus of an atom 核反应.
🔁 扩展释义
*[ri'ækʃәn]n. 反应, 反作用, 反动【医】 反应
🏥 医学释义
反应，回授，（正）反馈
📖 同为「高中」词汇
查看全部高中词汇 ›🗣️ 情景例句
Thank you all the same.
不管怎样都要谢谢你。
And what's that?
还有那是什么？
One man stayed at the wheel while two others with black stocking over their faces jumped out and smashed the window of the shop with iron bars.
一人留在驾驶座上，另外两个用黑色长筒丝袜蒙面的人跳下车来。他们用铁棒把商店橱窗的玻璃砸碎。