The baggage system tells me exactly how long my bags will take to arrive.

机场行李系统准确的告诉我行李到达的时间，正如承诺的一样，它们被准时的送到了。

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We know exactly how long this wreck has been under water and how long marine life has been growing on it.

我们能够确切地知道这些残骸在水中有多长时间，以及海洋生物在其上面生长了多久。

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Additionally, if you need to control exactly how long an animation takes, you can also pass in the number of milliseconds as the argument.

此外，如果需要精确控制动画时间，那就需要用参数指定毫秒数。

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She didn't specify exactly how long the initiative should go on but said victims deserved more than seven months.

WSJ: Judge Orders Hotel Shelters to Stay Open

Boeheim knew exactly how long it took for him to stop thinking about Smart's play on a regular basis.

WSJ: 'The Shot' is still hot topic 26 years later

What is never mentioned is exactly how long you would need to remain still and how still for this to be a risk.

BBC: Health threat from computer use