Scientific selection of workers is the second principle.
工人科学选择是第二个原则。
Improve spare time and train quality, expand the enrollment in the range, scientific selection;
提高业余训练质量，扩大招生范围，科学选材；
As to the city's green construction, we should also pay attention to"Incremental re-seed" and scientific selection of botanical variety.
漳州城市绿化建设还必须注意＂增量补种＂及植物种类的科学选择。
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