Visitors must sign in with security at the front gate before entering the factory.

訪客進入工廠前，必須先在前門向警衛登記。

The delivery truck waited outside the warehouse gate until the guard checked its paperwork.

送貨卡車在倉庫大門外等候，直到警衛檢查完文件。

Hotel guests can use their room key to open the side gate to the pool.

飯店房客可以用房卡打開通往泳池的側門。