Note: The flush method may be called more than once for each open .

注意：我们也可以对一个open多次调用flush方法。

youdao

Thus each orbit may be called, alternatively, an energy level.

因此，每一个轨道也可以交替地称作一个能级。

youdao

Thus each orbit may be called alternatively an energy level.

因此，每一个轨道也可以交替地称作一个能级。

youdao

Thus each orbit may be called alternatively an energy level.

因此，每一个轨道也可以交替地称作一个能级。

youdao