Chemistry in country middle school is poor of all course resource, which is lack of qualified laboratory technical staff, sufficient laboratories, laboratory instrument and chemical reagents.

化学课程是农村中学课程资源中较薄弱的部分，其中主要的原因是缺乏合格的实验技术人员、实验场地以及实验仪器和药品。

youdao

The proliferation of ballistic missile technology also greatly adds to the menace.... Diplomatic pressure to restrict proliferation, though it may be useful, can never be a sufficient instrument in itself.

CENTERFORSECURITYPOLICY: 'Courage'

ASRGs would give TiME sufficient energy to support a very capable instrument suite and a direct-to-Earth communications system to get its data home.

BBC: 'Boat' could explore Saturn moon