The other is the first step on the path to a particular sort of tissue such as the lining of a windpipe.

这一细胞在进化中首先会形成一个特殊的像气管内层一样薄膜组织。

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See from the distant, there are many horse groups lining in a line step by step.

远远看去，马帮在路上总算拉成一条线，不紧不慢地跟着。

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The leader of Portsmouth City Council, Gerald Vernon-Jackson, has long been regarded as the man lining up to step into Mike's shoes.

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Now, many who have submitted claims are likely walking with a lighter step, and many more are lining up to file new claims.

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Bureaucracy at every step--background checks, fingerprinting, drug testing and lining up insurance--ate up six months.

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