To suction with a bulb syringe, push bulb in with your thumb.
用球吸引器时先用拇指把球压扁。
A bulb syringe is often used for oral and nasal suction on infants and children.
常常使用球吸引器抽吸婴幼儿的口鼻。
Squeeze the rubber bulb to pump out the air from the tube, thereby creating suction.
挤压橡胶球泵的空气管, 从而创造吸力。
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