Without this muscular action, inhaling is like sucking air out of a balloon—the narrow passages tend to collapse.
如果没有这种肌肉运动，吸气就像从气球里吸出空气一样——狭窄的通道往往会坍塌。
Application: it is a systemic insecticide, with both contact and stomach action against sucking mouthparts pests such as plant hoppers, aphids, leafhoppers, thrips whitefly, ect.
用途：主要用于防治水稻、小麦、棉花等作物上的刺吸式口器害虫，如蚜虫、叶蝉、蓟马、白粉虱及马铃薯甲虫和麦秆蝇等。
Scientists had thought that the only way for a cell to morph and move is through the action of the cytoskeleton or the scaffold inside the cell, pushing membrane forward or sucking it in.
长期以来，科学家们认为，唯一一个让细胞改变形态或者移动的方法就是细 胞骨架分子的运动——推动细胞膜向前运动或者向后收缩。
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