This problem is known as lock convoying (see Resources for links to more information).

这个问题称为锁护送(lock convoying)(更多信息见参考资料中的链接)。

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MethodsThrough random cluster sampling, 699 convoying warship soldiers were investigated with Symptom Check-List 90 (SCL-90).

方法采用随机整群抽样法抽取699名护航舰队官兵，用症状自评量表(SCL- 90)对其进行心理测评。

youdao

MethodsThrough random cluster sampling, 699 convoying warship soldiers were investigated with Symptom Check-List 90 (SCL-90).

方法采用随机整群抽样法抽取699名护航舰队官兵，用症状自评量表(SCL- 90)对其进行心理测评。

youdao