二唇的二唇的，如金鱼草的花冠。
将唇口滑动而上的传热归结为第二类边界条件；
The authors assume that the heat flux at the sliding surface of the lip occurs for the second boundary condition.
方法：应用aloka - 630二维超声诊断仪对1176例中晚期妊娠的胎儿颜面结构进行观察，着重观察胎儿上唇是否连续。
Methods We observed with ALOKA-630 all the fetal faces of 1176 fetuses that it was second trimester and late pregnancy, and observed seriously whether the upper lip of fetal was continue or not.
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