Certainly, no homework should be assigned that students cannot complete on their own or that they cannot do without expensive equipment.

当然，不应该给学生布置无法独立完成或没有昂贵设备就无法完成的作业。

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Frills they never thought they could have become essentials that they cannot do without.

人们以前未曾想到那些虚妄的奢侈品有朝一日会变成自己不能离开的基本需求。

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Most Americans prefer to use cash at least some of the time, and even those who do not, like Mr. Zazula, grudgingly concede they cannot live without it.

大多数美国人在某些时候都偏爱使用现金，即使一些人例外，就像Zazula先生，但他们无法否认生活离不开现金。

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Frills they never thought they could have become essentials that they cannot do without.

ECONOMIST: Affluence

In my financial planning practice, clients choose various life qualities they cannot do without.

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However, they cannot do that without the in-depth knowledge of their specific organization and circumstances.

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