一旦生效 once it takes effect
撒旦先生 Lazy Programmer ; make a change
复旦大学研究生院 Graduate School of Fudan University
生旦净末 Go Home
生日旦 Dan Day
一旦在生活 once in life
一旦发生 In case of ; Once
一旦发生火灾 Once a fire ; In case of fire ; Once the fire
但一旦发生 But once it happened
先生［约旦 Ata Issa Almanasir ; Ashraf Ali Mohammad Jayousi
因此，如果为了以后生孩子而过早地对工作懈怠，那么一旦生完孩子你也许就没那么大的动力回去工作了。
So if you wind down your career too early out of concern for a future child, you may not have much to go back to once you have that baby.
京剧有四个主要角色：生、旦、净、丑。
There are four main roles in Beijing Opera: Sheng, Dan, Jing and Chou.
一旦相亲开始，人们可能期望她们仅在短暂恋爱后选择一生的伴侣。
Once matchmaking starts, they may be expected to choose a life partner after only a brief courtship.
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