Scalar variables are simple and indispensable.

标量变量简单而又不可缺少。

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They reaffirmed that their Trans-Atlantic Alliance will remain strong and indispensable.

他们重申跨大西洋联盟将保持强大和不可或缺。

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Calcium in milk is the most easy to absorb by people, and it is an important and indispensable material in brain metabolism.

牛奶中的钙最易被人体吸收，是脑代谢不可缺少的重要物质。

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President Obama yesterday characterized the India-U.S. partnership as one of the defining and indispensable partnerships of the 21st century.

WHITEHOUSE: President Obama and Prime Minister Singh Press Availability | The White House

Virtually all economists regard these constant-price measures as key economic indicators meaningful and indispensable for analysis of growth and fluctuations.

ECONOMIST: Letters | The

But, in truth, the state's involvement in marriage is both inevitable and indispensable.

ECONOMIST: Gay marriage