该项目还必须由美国联邦航空管理局和美国陆军工程兵部确保批准。
The project must also secure approvals from the Federal Aviation Administration and the U. s. Army Corps of Engineers.
分析人士说，不管两国在什么时候达成新协议，这个新协议必须由美国参议院和俄罗斯国家杜马批准后才能生效，而批准过程可能要花上好几个月。
Analysts say whenever the two sides agree on a new treaty, that pact must still be ratified by the U. s. Senate and the Russian Parliament - or Duma. And that process, say experts, may take months.
对这些问题仍然没有明确的答案，因此它们必须由你们来回答——由在俄罗斯、美国和全世界的你们这一代人来回答。
Those questions still don't have clear answers, and so now they must be answered by you — by your generation in Russia, in America, and around the world.
美国人每天有22小时是坐或躺下的，但我们的身体必须由许多许多日常活动构成。
Americans spend 22 hours a day sitting or lying down, yet our bodies are built for lots and lots of daily activity.
美国人每天有22小时是坐或躺下的，但我们的身体必须由许多许多日常活动构成。
Americans spend 22 hours a day sitting or lying down, yet our bodies are built for lots and lots of daily activity.
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