The pool checks each state (on an interval basis) when it was last checked out.

游泳池检查每个状态（一个间隔的基础上）当它最后被检查出来。

youdao

The next pitch on the trumpet is actually an interval of a fifth.

小号的下一个音高实际上是一个五度音程。

youdao

Then the next pitch on the trumpet is actually an interval of a fifth.

然后下一个音高在小号那里，实际上是一个五度音程。

youdao

Then the next pitch on the trumpet is actually an interval of a fifth.

然后下一个音高在小号那里，实际上是一个五度音程。

youdao