他支持这个决定，但对实施细节仍有疑虑。

He supported the decision but had some ___reservations about the implementation details.

我们需要提前预订酒店房间。

We need to make ___reservations for hotel rooms in advance.

这个保留地是为当地原住民社区设立的。

This ___reservation was established for the local indigenous community.