起跑的英文：
get off
get off the mark

参考例句：

The runners set off at a blistering pace.
赛跑者以极高的速度起跑。

They're ready for the off.
他们已准备好起跑

Relax your muscles before starting to run.
起跑前应将肌肉放松。

Runners stand at starting line before lace.
比赛前，选手们站在起跑线上。

toe the scratch v.
用脚尖踩在起跑线上；遵守规则；承担责任

toe the scratch
用脚尖踩在起跑线上|遵守规则|承担责任

Let's see how fast you can pick up from a standing start.
看看你站着起跑后能加速多快。

The runners have got away and the Tenth International Marathon Race has begun
赛跑者们都已起跑，第10届国际马拉松赛跑开始了。

They are under starter's orders, but the horses are restless
赛手们都在待令起跑，但他们的赛马却烦躁不安。

Of the five starters in the race only three finished
起跑时有五个,只有叁个跑完全程

get是什么意思：
v. 得到；抓住；获得；受到（惩罚）；说服；到达，来；变得，变成；设法；开始
n. 幼兽；生殖

Get to the bottom of
弄个水落石出

Saving is getting
节约等于收入

It was getting dark.
天色渐暗。

off是什么意思：
adv. 掉，下；离开；隔开；切断；停止；；休息；光，完，尽；全部地
prep. 从...离开；从...向下；在...的外面；偏离...；从...分岔；不再从事...；低于...
adj. 关着的；停止流通的；延期的；取消的；不工作的；处于...境况的；萧条的
v.（用于祈使句）走开，滚开；站开
n. 关掉

Is the water on or off?
自来水龙头开着还是关着？

The gilt is off.
幻想破灭了。

to nip off; to cut off; to break
掐断

mark是什么意思：
n. 符号；记号；分数，成绩；污点；迹象
v. 做记号；做标记；表明方位；标志；庆祝

Marking: Every package shall be marked with “SM” in diamond and marked the package number.
麦头每件包装应刷上菱形图案内有二字,并应刷上件号

impress a mark on [ upon ] a surface=impress a surface with a mark
在表面上打记号

To mark or mottle with spots.
有斑点，成斑驳用点作标记或使斑驳杂色