But that does not mean it is safe, nor even that it can strictly be saved, in the sense of returned to some pristine pre-industrial state, not at least for thousands of years.

但是这不意味着海洋是安全的，甚至不意味着海洋可以被严格地挽救，即回到工业化前的某些原始状态，更不是回到至少几千年前的状态。

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Car camera, Active Pre-safe System, Vehicles Electronics.

车用摄像头，主动式安全系统，车用电子产品。

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High risk project approval must be safe production as a pre condition.

高危项目审批必须把安全生产作为前置条件。

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In a statement, Nasa said the problem had been detected on Tuesday, when the telescope went into a pre-programmed "safe mode" which kicks in "if the observatory has trouble knowing where it should point", Mr Grunsfeld told AFP news agency.

BBC: Nasa's Kepler telescope hobbled by faulty wheel

His company, Verified Identity Pass , a screening service that's created an express lane at airport security posts for pre-screened passengers deemed safe by the government, has effectively been cleared to take off past its initial successful test run in Orlando, Fla.

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In another trial called PrEP -- pre-exposure prophylaxis -- the CDC is also studying whether antiretroviral pills are safe and effective in preventing HIV infection.

CNN: Gel cuts HIV transmission rate in study