[xiān tiān]
(生来就有的) congenital; inborn; innate
congenital defect
先天的缺陷
Cosmetics do not cover up the deficiencies of nature.
化妆品并不能掩盖先天缺陷。
[哲] a priori; innate
Correct ideas are not innate in the mind, but come from social practice.
正确的思想不是头脑中先天固有的, 而是来源于社会实践。