在过去的半个世纪里，胎头娩出后的产科医生的第一个动作就是用橡皮吸球吸新生儿的口腔鼻咽，以防那儿的分泌物干扰新生儿的初次呼吸。 最近专家们建议停止这一操作。
During the past half century, the first action an OB took after delivering the fetal head was to perform oronasopharyngeal suctioning, using a bulb or DeLee device.
手应像杯子一样吸在球上。
他们利用12道激光束同时袭击一个小小的塑料球，再利用所形成的部分辐射引爆一个硅球，而硅是吸积盘中的一种常见元素。
They zapped a tiny plastic pellet with 12 laser beams fired simultaneously and allowed some of the resulting radiation to blast a pellet of silicon, a common element in accretion disks.
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