be traced to例句

Depression can be traced to holding in anger.
抑郁症可以追溯到对愤怒情绪的压抑。

Lovelock'sprincipled nonconformity can be traced to his childhood.
洛夫洛克自成一套的特立独行可以追溯到他的童年时期。

These quotations cannot readily be traced to their sources.
这些引语很难查出出自何处.