The sandbox is time-boxed, but there is no limit to how much you can use it.

沙箱是有时间限制的，但是对于您使用它的程度却没有限制。

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Limit bath time. Hot water and long showers or baths remove oils from your skin. Limit your bath or shower time, and use warm - rather than hot - water.

控制洗浴时间。热水和长时间的淋浴或泡澡能祛除你皮肤中的油分。要控制你的泡澡或者淋浴时间，使用温水——而不是热水。

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Lack of training or training at the wrong time will impact your team's productivity and may limit the effective use of the tools.

缺少培训或者在不恰当的时间进行培训将影响您团队的工作效率，并且可能会限制您对这些工具的有效利用。

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In addition the higher costs of flash memory versus magnetic storage will probably limit the use of these storage devices to acceleration applications for some time to come.

FORBES: Have Hard Disk Drives Peaked?

The justices ruled that there had been no change of use within the section of the Town and Country Planning Act, which imposes a four-year time limit for taking enforcement action against breaches of planning control.

BBC: Couple lose fight to live in Hertfordshire luxury barn

Microsoft said the software would be available to anyone who wanted to use it and downloading it would not involve registering with the software firm or having a limit on the amount of time it could be used for.

BBC: Microsoft launches free security