Auditory meatus, external The passageway leading from the outside of the head to the tympanicmembrane.
由头外部至鼓膜的通道。

The Effect of Temperature on Degradation of OrganicMatter by Microbes during Sludge Composting
污泥堆肥温度对微生物降解有机质的影响

At the same time, many schools practice a mixed enrolment of students of ethnicminority and Han origins.
同时还有不少学校实行民汉合校。