释义
(of a schoolteacher)acting as a temporary substitute for another
（学校教师）代课。
双语例句
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I worked on supply vessels.
我在供给船上工作过。
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We are hand and mouth on supply.
我们的手和嘴的供应。
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The answers hinge on supply and demand.
答案取决于供给与需求。
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Great impact on supply of forest products.
三是对林产品供应影响重大。
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A persistent shortfall in demand will weigh on supply.
持续的需求不足将对供给造成压力。