But for now, she appears to have vanished without a trace.但目前，她似乎凭空消失，毫无踪影

appear to看来像是； 看来似乎

They appear to be able to handle the problem.

他们似乎可以处理这个问题。

This novel appeared to have been huddled together.

这部小说看来是草草写成的。

That girl is involved, and I am dead certain of it.我敢确定那女孩逃不了干系

certain of确信 ...

Have you made certain of the time of the train?

火车开车时间你搞清楚了吗？

I'm not certain of the truth of the matter.

我不相信这种情况是真的。

相关短语make certain of确定(弄清楚；弄确实)

I want to make certain of the time of his arrival.

我想确切知道他到达的时间。

Please make certain of the date of the meeting.

请把开会的日期弄清楚。