The Bohai Sea and Huanghai Sea are unbenefit of submarine activity, but benefit of general subject training.

渤海、黄海不利潜艇活动，但利于完成常规科目训练。

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"With the first subject, after about 20 hours of training, his digit span had risen from 7 to 20," Ericsson recalls.

“对于第一个实验对象，经过大约20小时的训练，他的数字跨度从7上升到20。”爱立信回忆道。

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Whether these two actually have any medical training was a subject of some speculation from the rest of Kim's entourage, according to a former bodyguard.

不管这两人是否真地接受过医疗培训，据不完全估计，她们都是在金休息的时刻伺服其左右人物，据一位曾经担任过警卫任务的人员透露。

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We are not psychologists and do not have formal training in the subject.

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Service providers undergo rigorous training and are subject to outside audits.

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The report also reflects that the majority of young people currently get most of their history in primary schools and urges better training in the subject for primary teachers.

BBC: Overhaul school history, urges report by MPs and peers