The teeth would stay hidden untiltime to strike out at prey.
这些牙齿只有在向猎物突袭时才会露出来。
2
The researchers set out to estimate the lifetimes of today's stock of all these things, and to project roughly the amount of greenhouse gases they would emit up untiltime of retirement.
科学家开始着手估算当今所有这些东西的存量,从而大致得出在它们消失前排放的温室气体总量。
3
I'm just killing timeuntil I can talk to the other witnesses.