drills
[drɪlz]
n.
操练( drill的名词复数 );
钻头;
军事训练;
（应对紧急情况的）演习;
v.
钻（孔）( drill的第三人称单数 );
打（眼）;
操练;
训练;
例句:
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Sow the seeds in drills about 1/2in. deep and 12in. apart.
在深约0.5英寸，间隔12英寸的条播沟里播种。
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The racket of drills and electric saws went on past midnight.
钻孔机和电锯的噪声过了半夜还继续响着。
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He drills the choir to a high standard.
他将合唱团训练到了一个高水平。
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The spokesman says the drills could lead to provocation.
来自VOA
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Washington and Seoul have insisted the drills are defensive.
来自VOA
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They said North Korea has been notified about the drills.
来自VOA