You need to pay as you enter.

你进来时要付钱。

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You need to pay only $400 per month.

你每月只需付400美元。

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You need to pay 2 euros a day for Wi-Fi.

你需要每天支付2欧元才能使用无线网络连接。

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Or a situation that you need to pay attention to.

又或者是这种情况需要你关注，

It's important 课堂 - SpeakingMax英语口语达人

If you set up a company, you don't want to pay a dividend for a while because you need the money and you're reinvesting it in the company and people will understand.

如果开办一家公司的话,短期内你不会想发放股利,因为你需要将收益用来投资,人们会理解这一点

耶鲁公开课 - 金融市场课程节选

Bubble messages are free to record, but you need to pay (at least airtime) to listen to them.

FORBES: Magazine Article

This could change your calculation of whether you need to pay estimated taxes.

FORBES: Year-End Tax Planning Tips For Stock Options And Restricted Stock

You need to pay all earned income fees and officer salaries before year-end.

FORBES: Tax Strategies For Extraordinarily Uncertain Times