Relationships between the transition velocity and bubble diameter has been analyzed for beds with and without baffles.

最后分别针对挡板床和自由床分析了比临界速度与气泡的关系。

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To transition the older ones to sleep at the same time (they share a room) I started sitting between their beds and stretching out my arms so that they can each hold a hand as they fall asleep.

FORBES: The Right to Choose: Work and Motherhood