City University of Hong Kong CLASS CLASS
Making Sense of Grammar
+1 vote
两个扩张有什么区别
asked Mar 14 in Questions about English Grammar by 117030200114cyw (160 points)

2 Answers

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extend 指在一个方向上的延伸、加长: extend a railway 将铁路延长
expand 指范围、体积的扩大、膨胀:Iron expands when it is heated.(加热后铁会膨胀)

answered Mar 19 by 118030200515yr (260 points)
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extend是“延伸”的意思,主要形容线性物体向两头扩展的情形。
expand是“膨胀”的意思,主要形容体型物体在三维上体积的增大的情况。

answered Mar 19 by 118030200516ml (340 points)
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