Most modern kayak helmets will provide a soft inner layer with adjustable retention systems and additional padding to secure around the head.

大多数现代皮艇头盔将提供一个可调节系统和保留更多的填充，以确保各地的头部软内层。

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GDMG the GDMG wanted to do was to send the signal that these people were high potentials, were recognized as such and the Merrill Lynch was willing to invest them in order to increase the retention.

的，And，what，the，head，of,负责人想要,发出信号说明,这些人有很大潜力，他们已经得到认可,美林愿意为他们投资,以增加留职人数。

麻省理工公开课 - 媒体、教育、市场课程节选

The head of the Armed Forces, Air Chief Marshal Sir Jock Stirrup, insisted the retention of three services was "plausible".

BBC: UK armed forces 'need coalitions' for future conflicts