It is nothing for a big, strong schoolboy to elbow an elderly woman aside in the dash for the last remaining seat on the tube or bus, much less stand up and offer his seat to her, as he ought.

在地铁或公共汽车上，一个身强力壮的男学生在冲向最后一个座位时，用胳膊肘把老妇人推到一边，这算不了什么，更不用说他本应站起来给她让座了。

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A cylinder (Fig. 1) is a hollow tube with a closed concave base that permits the cylinder to stand upright.

钢瓶(图1)是中空的管道，封闭的底部是凹入的，这样可以直立起来。

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A cylinder is a hollow tube with a closed concave base that permits it to stand upright.

钢瓶是中空的管道，封闭的底部是凹入的，这样可以直立起来。

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Though the Astor's bolsters stand alone, most designers still use the tube-shaped cushions as part of a pillow mix.

WSJ: Bolster Cushions Win Best Supporting Rolls