Examples
yào要dōu都jiě shì解释de huà的话，xū yào需要yí bèi zi一辈子de的shí jiān时间。
要都解释的话，需要一辈子的时间。
It would take forever for me to explain everything.
一辈子只会出现一次像这样的机会。
An opportunity like this only comes along once in a lifetime.
只有小说人物才会有一辈子不改变的性格。
Only in novels do you find individuals who live out their whole life with unvarying character.