I took the subway to Gong's second-floor office marked with a hand-painted sign.
我乘地铁来到二楼带着手绘标志的龚的办公室。
He looks over the bare concrete floor, looking for any sign of tampering.
他看着光秃的混凝土地板,寻找任何不寻常的迹象。
It's easy to decide since each floor has a sign telling you what's inside.
很容易做决定,因为每层都有一个提示牌告诉你里面有什么。
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