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acid
a.酸性的；尖酸苛薄的 n.酸性
Acid rain is a result of air pollution.
酸雨是空氣污染造成的。
When Mary criticized their work, you could feel the acid tone in her words.
瑪麗在批評他們的工作時(shí)，你可以感覺出她話中那股酸溜溜的語氣。
If we mix these two chemicals together, they will form an acid.
如果我們把這兩種化學(xué)物混合在一起，他們會形成酸。
motivate
vt.促使，激發(fā)
Encouragement can often motivate students to study harder.
鼓勵往往能激發(fā)學(xué)生更用功。
Peter is rude to girls. We should do something to motivate him to change his attitude.
彼得對女孩子很粗魯。我們應(yīng)有所作為以激使他改變態(tài)度。
motivation
n.動機(jī)；干勁
You should make sure that your motivation for losing weight is healthy.
你應(yīng)該要確定你想要減肥的動機(jī)是健康的。
I have no motivation toward the project. I'm not interested in it.
我對這項(xiàng)企劃沒有動力。我對它不感興趣。
pessimistic
a.悲觀的（與介詞 about 并用）
Paul is pessimistic about his future. He should learn to look on the bright side of life.
保羅對他前途持悲觀的態(tài)度。他應(yīng)學(xué)習(xí)看人生的光明面。
optimistic
a.樂觀的（與介詞 about 并用)
Investors are still relatively optimistic about the company's prospects.
投資人對該公司的前景仍舊相當(dāng)樂觀。
mist
n.薄霧
Because of the mist, we didn't have a clear view of the mountains.
我們因?yàn)殪F氣而看不清楚山景。
smog
n.煙霧
Los Angeles is known for its smog and its crime.
洛杉磯因煙霧與犯罪率而出名。
frost
n.霜
In the place where we live, you see frost on the ground in winter.
冬天時(shí)，我們住的地方地面都會結(jié)霜。
container
n.容器
You should store these cookies in a container with a tight lid.
你應(yīng)該把這些餅干保存在一個有密閉蓋子的容器里。
farewell
n.告別；送別
We said our last farewell to our good friend at her funeral.
我們在好友的喪禮中向她做最后一次的告別。
We threw a farewell party for David, who is retiring tomorrow.
我們?yōu)榇笮l(wèi)舉行惜別會，他明天就要退休了。
capitalism
n.資本主義
Many say that the U.S. is a country founded on capitalism.
許多人說美國這個國家是以資本主義立國。
capitalist
n.資本家
Mr. Tate was labeled (as) a capitalist at a young age, but his beliefs have changed since then.
泰特先生年輕時(shí)被視為是資本主義者，但之后他的想法改變了。
