它们便是咀嚼式口器及吸收式口器。一些咀嚼式口器在池塘边喝水可能会有困难，所以通过咀嚼叶子来获取水分会更简单。
There are chewers and suckers. Some chewers may have a difficult time trying to draw water from a pond, whereas getting their water from chewing a leaf is simple.
结果：两例病例折叠式上颌全口义齿的咀嚼效能达到常规全口义齿的75 %以上。
Result:The masticatory efficiency of collapsible complete denture was more than 75% of the conventional …
在咀嚼运动循环中，线性总义齿咀嚼周期的间歇期短于解剖式总义齿（P<0.05）。
The interval duration of mastication of linear occlusal dentures was shorter than that of anatomic occlusal dentures in the mastication movement cycle( P< 0.05 ).
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