The strange, almost incomprehensible fact is that many professors, just as they feel obliged to write dully, believe that they should lecture dully.

一个奇怪的、几乎不可理解的事实是，许多教授认为他们应该用一种枯燥的方式讲课，就像他们觉得写作也必须很枯燥一样。

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You need not feel obliged to contribute.

你不必认为你非得捐款。

《柯林斯英汉双解大词典》

In such cases, some doctors feel obliged to hasten death.

在如此的方案里，有一些医生感觉用措施加快死亡是必须的。

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But they still feel obliged to avoid the areas of eastern Baghdad controlled by the Sadrists.

ECONOMIST: Iraq and the Kurds: A truly national army? | The

Would the American president still feel obliged to defend Israel from the consequences of its own folly?

ECONOMIST: Lexington

The danger, said Mr Upton, is that people might feel obliged to lose their accents rather than their prejudices.

BBC: By BBC News Online's Liz Doig