计时

He timed a runner in the race.

他为一赛跑运动员。

The spaceship is already being counted down.

宇宙飞船已开始倒数了。

The factory timekeeper keeps account of the hours of work done.

工厂出勤员记录工作的。

This is Tick-Tock McGlaughlin live at Clocker's Corner.

这里是滴答麦考林，在之角为你直播。

The whole world was counting down to the new millennium.

全世界都在倒迎接新千年的到来。

Officials include a referee, judges and a timekeeper.

裁判人员包括一台上裁判员、若干台下评判员和一员。

This clock is a good timekeeper.

这钟是一个很好的器。

The mass was calculated by timing the orbit of Eris' moon Dysnomia.

通过对厄里斯的卫星--戴丝诺米娅运行轨道后算出了厄里斯的质量。

In this paper,analytical expressions for double step potential chronoamperometry and chronocoulometry with simple reversible electrode reaction at microring electrodes are derived.

推导了微环电极上双电位阶跃电流和仑法可逆波理论方程式，并得到了解析表达式。

If you spot a countdown standee in a local store, feel free to snap a picture of it and send it in!

如果你在地方商店发现了一个倒数牌，自由地咔嚓一张它的照片然后呈报进来!

The dissociation reaction preceding the charge transfer in silver deposition from uracil silver system was investigated using chronoamperometry and rotating disk electrode methods.

电位及旋转圆盘电极实验表明在银配合物还原过程中存在前置化学转化步骤。