They are thoroughly drilled in English grammar.

他们在英语语法方面受到严格训练。

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Five wells drilled in the 1970s turned out to be dry, as was a sixth in 2000.

上世纪70年代他们钻探了五口深井，结果都是干涸井，2000年钻探的第六口井亦是如此。

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A small hole drilled in the filter intake just below water level will prevent accidental syphoning.

在滤器水位以下的入口上钻一个小洞就可以防止意外漏水。

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Right-back Gretar Steinsson drilled in a slightly deflected low 22-yard strike to put Bolton ahead.

BBC: Bolton 1-1 Hull

Fear of failure is rampant among students who have been drilled in standardized-test taking, he says.

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The UTSA estimates that by 2020, over 5, 000 wells may be drilled in this region alone.

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