First, it goes without saying that you must carefully prepare the materials you are going to play.

首先，不得不说的是你必须要仔细准备好你演奏所需要的一切材料。

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Master: you must read and sign the standing orders prior to your first watch. Remember to read the standing orders carefully.

船长：你必须在首次值班前阅读常规命令并签字，记住仔细阅读常规命令。

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First, you must listen to the teacher carefully, it means less work after class.

首先，你必须认真听老师讲课，这意味着课后作业少了。

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Instead, you must first carefully consider both savings and convenience factors before deciding which gas credit card ultimately best fits your lifestyle: one tied to a certain chain or one providing more flexible benefits.

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