源头: headstream; head; fountainhead; source 短语和例子一条河的源头 the source of a river; 探险者在中非找到了尼罗河的几处源头。 explorers traced the nile river to its several headstreams in central africa
在乎: 1.(在意) care about; mind; take to heart 短语和例子满不在乎 not care a bit; 我不在乎这样的冷天。 i don't mind the cold.2.(在于) lie in; rest with