With the opening of the visitor centre, sightseers will pass through metal detectors and queue up for tours amid air conditioning and plentiful lavatories.

在访客中心开放后，观光者们将在有空调和很多洗手间的地方，通过金属探测器、排队等候参观。

Lavatories are always too small.

厕所总是太小。

Please do not smoke in the lavatories.

在洗手间内请不要吸烟。

And, of course, its lavatories were unremarkable.

当然，它的厕所也是稀松平常的。

One reason for that is that men and women use lavatories differently.

造成那样的原因之一是男女使用卫生间的方式差异。