An empty function as a placeholder for the code that will actually perform the desired work.
一个空的函数，它作为实际执行所需工作的代码的占位代码。
可复用的空函数。
Conclusion: Ultrasound was able to assess the empty function of stomach in healthy subjects.
结论：超声能准确评价正常胃排空功能状态。
Conclusions in normal people, with the increase of age, left atrium size, pressure and reserve function increase, and the passive empty function is reduced in aged people.
结论正常人中老年组较青年组左房扩大，心房内压力和储存功能增加，心房内血流速度及被动排空功能下降。
Effects: Empty function. The argument is ignored.
作用：空函数。参数被忽略。
Effects: Empty function. The argument is ignored.
作用：空函数。参数被忽略。
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