The lungs of a fetus secrete a liquid that mixes with its mother's amniotic fluid.
胎儿的肺部会分泌一种能与母亲的羊水混合的液体。
The glands on its hind feet can secrete poisonous fluid.
它后脚上的腺体能分泌出毒液来。
We may not think often of the insects that secrete this sticky fluid, but Ethiopians do.
我们可能并不经常去想分泌这种粘稠液体的昆虫，但埃塞俄比亚人却对此十分关注。
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