The main bathroom is hidden by a huge sliding wall and only appears when you need it.

主浴室隐藏着一个巨大的滑动墙，只有当你需要它时才将其拉出来。

youdao

However the open walk in shower has design flaw and the water leaks on the main bathroom area Which is unpleasant.

然而，开放式的步入淋浴设计上有点缺陷，水漏到整个主浴室，有点不好。

youdao

There's a bathroom off the main bedroom.

主卧室旁边有一个卫生间。

《牛津词典》

Completing the main floor is the kitchen and a large master suite that includes a large dressing room, bedroom and bathroom.

WSJ: Southern Living in the Round

Beneath the two passenger decks of this modified super jumbo is an Air Force One-style air-stair -- allowing access to the tarmac without the need for a sky-bridge or external staircase -- and a crew dining area, crew gallery, crew bathroom, sleeping quarters for eight on bunk beds, a communications room and spiral staircase leading to the main deck.

CNN: Luxury living at 35,000 ft