be unsure of

基本解释

Always have an alternative date and time or location in mind should the person be unsure of their diary.
永远有一个时间或地点的后备计划，以防跟她的计划有冲突。
samuelcai1998.spaces.live.com
Auditors may be unsure of the exact controls that may work, but this can be established through discussions with the managers when finalising the audit report.
审计人员也许还不了解何种控制方法真正起作用，但在形成审计报告前，与经理人员进行探讨可以解决该问题。
Believe it or not there are still some people out there that are ignoring social media. They may be unsure of how to participate or maybe they just don't have time to get involved.
完全无视社会媒体的存在：有人把它捧得老高，但是就是有那种不顾一屑，完全脱离社会媒体的群体，不要觉得奇怪，或许他们不知道怎么参与进来，又或许他们根本没时间。

And say they are unsure whether there will ever be a normalization of Zimbabwean politics, given ZANU-PF's 30-year domination of the country.

Depending on the situation, your employee may be ready to return to his or her desk after regaining composure, and the rest of your team may be a little unsure of how to proceed.
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"We had three or four trauma teams in different rooms set up and ready, " unsure of whether they would be treating a bombing suspect, injured police or bystanders, Schoenfeld said.
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With that being a T-Mobile exclusive for now, however, we're unsure that it'll be the recipient of so much pomp and circumstance.
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