An on-off switch allows current to flow only when it is in the closed ( on ) position.
对,使开关电流流只有当它在禁闭 ( 上 ) 的立场.
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Xeloda is a chemotherapy pill that kills cancerous cells. Avastin cuts off blood-flow to tumors.
希罗达是可以杀死癌细胞的化疗药物, 而阿伐斯汀却能切断肿瘤血管.
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直升机在 非 航空型舰船飞行甲板起降时,甲板区域复杂的气流流动严重影响飞行安全.
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