In order for a chemical to be considered a drug, it must have the capacity to affect how the body works.

为了使一种化学物质被认为是一种药物，它必须具有影响人体运作的能力。

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You are going to have to take a certain amount of criticism, but you must cope with it.

你会受到一定程度的批评，但这是你必须面对的。

《柯林斯英汉双解大词典》

In order to register a car in Japan, the owner must have somewhere to park it.

在日本要想登记一辆汽车，车主必须要有停车的地方。

《柯林斯英汉双解大词典》

They have less than two weeks to go before they must perform the play for the Shakespeare in the Courts program.

VOA: special.2010.06.03

He's earned the right to treat himself to this absolutely lovely -what must have been an extraordinary amount of fun to write -lovely catalog of flowers.

他已经得到了游荡的可爱之处,写这些一定会特别有趣,可爱的花丛中的权力。

耶鲁公开课 - 弥尔顿课程节选

By the same token, if literature has effects, it must have effects on someone, and this gives rise to the equally interesting and vexing question, "What is a reader?"

同样，如果文学史有影响的，它一定会对某些人产生影响，它也会引出一个同样有趣,而恼人的问题，“读者是谁？“

耶鲁公开课 - 文学理论导论课程节选

Arora: When things go from a nice-to-have to a must-have, you usually see good business effects.

FORBES: Google: Global Ad Demand Still 'A Mixed Bag'

Group-buying has moved from a nice-to-have to a must-have marketing strategy for virtually all online businesses, and with the recent activity seen in the past few days the pace will only become more rapid.

FORBES: Online Group Buying's Need For Speed

Women who have the power to decide when to get pregnant also must have the power to vaccinate their children, feed them healthy food and pay their school fees.

CNN: Empowered women make nations strong