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1·He observes keenly, but says little.

他观察敏锐，但言语寥寥。《牛津词典》

2·She remained keenly interested in international affairs.

她一直对国际事务有强烈的兴趣。《柯林斯英汉双解大词典》

3·They're keenly aware that whatever they decide will set a precedent.

他们敏锐地意识到无论他们决定怎么做，都会开创先例。《柯林斯英汉双解大词典》

4·They had been longing to have each other to themselves, apart from the world, but it seemed they never felt so keenly that they were still units in modern society.

他们一直渴望与对方独处，远离世界，但似乎他们从未如此强烈地感到自己仍然是现代社会中的一员。

5·We were keenly aware of the danger.

我们深知其危险。《牛津词典》

6·Charles listened keenly.

查尔斯竖起耳朵听着。《柯林斯英汉双解大词典》

7·The contest should be very keenly fought.

比赛应该争夺很激烈。《柯林斯英汉双解大词典》

8·Mrs. Southern listened keenly, occasionally breaking in with pertinent questions.

萨瑟恩夫人兴致勃勃地听着,偶尔插入一个相关的问题。《柯林斯英汉双解大词典》

9·Huck searched his comrade's face keenly.

哈克仔细地打量着他同伴的脸。

10·The woman moved nearer to him and peered under his bonnet keenly and closely.

那女人靠近他，仔细地端详着他女帽下面的脸。