我把煮蛋计时器设为三分钟，这样蛋黄会保持流动。

I set the ___egg-timer to three minutes so the yolk stays runny.

我在煮鸡蛋时用沙漏计时器来确保完美的熟度。

I use an ___egg-timer when boiling eggs to get the perfect doneness.