He lives on the fifteenth floor.
他住在第十五层。
John lives on the fifteenth floor.
约翰这在第十五层。
There are eighteen floors in the building, and he lives on the fifteenth floor.
这幢大楼有18层，他住在第15层。
Then he got out of the lift and climbed up to the fifteenth floor on foot.
于是他从电梯里走 出来，然后步行爬上第15层楼。
Then he got out of the lift and climbed up to the fifteenth floor on foot.
于是他从电梯里走 出来，然后步行爬上第15层楼。
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