Most English classes in primary schools there is a lesson tight re-mission situation.
小学英语课大都存在着课时紧、任务重的情况。
Boreholes are primary means of getting stratum information, and have very high re-use value.
工程钻孔数据是目前获取地层信息的主要手段，具有很高的重复利用价值。
Boreholes are primary means of getting stratum information, and have very high re-use value.
工程钻孔数据是目前获取地层信息的主要手段，具有很高的重复利用价值。
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