by then 造句意思是到那时造句还要写出中文 还有in place of 代替的意思

I'm sure that everything will be better by then.
我相信到那时一切都会更美好.
Return at five,I shall be ready by then.
你5点钟回来,那时我将准备好.
They 'd lived here for ten years by then.
到那时为止他们住在这里10年了.
He used dry straw in place of a bed.
他用干草代替床.
Nylon is widely used in place of cotton nowadays.
现在尼龙已被广泛地用来取代棉花.
protective stockings worn with or in place of boots
配着靴子或代替靴子穿的保护性长袜