单词：air marking
air marking的用法和样例：
例句
- Between the fibers are many small pockets of air.纤维之间有很多小气泡。
- After semination, the penis continues to raise inserts, may cause in the vagina to enter many air, produces the bubble to hinder to become pregnant.当射精后，阴茎继续提插，可使阴道内进入较多的空气，产生小气泡而妨碍受孕。
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