最后，必须做出共同努力来实现对这些秘密活动的有效的国会和大众监督。
And finally, there must be a concerted effort to develop effective congressional and public oversight of these clandestine activities.
如果高铁想要成功运营，必须采取更严格、更有效的手段，将护路设备的活动与高铁运营分离开来。
If HSR is to be a success, more rigorous and effective means will be required to separate train operations from MOW activities.
我们要尽可能谨慎和有效地利用时间，这意味着要确定活动的优先次序，以便将大部分时间花在我们真正想要做的事情上。
We need to use it as carefully and as productively as we can, that means prioritising our activities so that we spend most time on the things we really want to do.
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