Challenge (pt&pp.challenged)
n.挑戰；盤問；質疑；懷疑
vt.質疑；向…挑戰
vi.提出挑戰，要求競賽（或競爭）；駁斥

I like a big challenge and they don't come much bigger than this...
我喜歡大的挑戰，而所有挑戰中再沒有比這更大的了。
The new Germany must rise to the challenge of its enhanced responsibilities...
一個嶄新的德國必須迎接挑戰，承擔更多的責任。
I challenged him on the hypocrisy of his political attitudes.
我就他虛偽的政治觀點質問他。

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Decrease (pt&pp.decreased)
n.減少，減小；減少量
vi.&vt.減少，減小

The number of independent firms decreased from 198 to 96...
獨立公司的數量從198個減少到了96個。
Bank base rates have fallen from 10 per cent to 6 per cent — a decrease of 40 per cent.
銀行的基本利率已從 10% 降到了 6%，降幅高達 40%。

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Significant
adj.重要的；有意義的；有重大意義的；值得注意的
n.有意義的事物；象征，標志

It is the first drug that seems to have a very significant effect on this disease.
這是第一種似乎對該病有顯著療效的藥物。
Time would appear to be the significant factor in this whole drama.
時間似乎是整部劇中一個舉足輕重的因素。

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Keen on
熱衷于有興趣的

His european partners are keen on emasculating hedge funds.
他的歐洲伙伴們熱衷于削弱對沖基金。

劇情百科

有了目標就要有實際行動，Liza開始為自己的哈佛夢做準備。

考考你 Q&A
Q: Please use the word or phrase you just learnt to complete the sentence beblow.

1.They have been involved in a campaign of _____.
他們參與了一系列的欺騙活動。
2._____, mr obama and other democrats assailed the idea.
無論如何，當時奧巴馬及其他民主黨人對麥凱恩的觀點進行了抨擊。

A:本期答案見下期
上期答案：

1.Many genes have been identified that either increase or (decrease) appetite.
許多被發現的基因要么增進食欲要么減退食欲。
2.Anyone (keen on) modern music should not miss the opportunity.
凡喜歡現代音樂者都不應錯過這次機會。