上唇

By apperance, Africans are more close to the quadrumana, such like their high cheekbone, deep eye socket and pitched lips.

从外貌来看，非洲人长相更接近灵长目科，高颧骨，深目，唇前。

The mandibles are usually lost, the labrum is reduced to a narrow transverse sclerite, and the labium is a small flap ( though its palps retain quite large).

消失，唇退化为一条窄横片，唇退化为一小片（唇须发达）。

The experiment is such: Researcher uses foam rubber or plastic from the female alar collect secretion, dissolve is in at the inunction after alcohol the labrum of a few females.

研究人员用海绵从女性腋收集分泌，酒精后涂擦在一些女性的唇。