close by
近在手边,在近旁
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a mortar burst close at hand .一枚迫击炮弹就在眼前爆炸。
readily accessible when needed
可随时使用,可方便地得到。
close in time; about to happen
即将到来;即将发生
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a breakthrough in combating the disease may be at hand .抗击此疾病的斗争可能很快就会有突破。