她一走出视线就突然开始跑。
比赛中有的运动员会突然出现腹痛，其原因一般来说是准备活动做得不充分，加上天气比较冷，开始跑时吸入了大量的冷空气或起跑速度过快等，出现“岔气”现象。
Some athletes may suffer a sudden abdominal pain during the race, which is often caused by insufficient warming-up exercise, a cold weather so that a lot of cold air is inhaled, or running too fast.
那狗突然开始绕着房子跑。
我渐渐跑远了，开始思考要我做出这样的抉择是多么突然，以及这种事情发生的频率。
As I ran away, I started to think of how suddenly the need to make a choice had come upon me, and how often such things happen.
突然，敌军士兵开始跑动，他边跑边开枪为自己作掩护。
Suddenly, the enemy is on the move, squeezing off a few rounds of covering fire as he runs.
突然，敌军士兵开始跑动，他边跑边开枪为自己作掩护。
Suddenly, the enemy is on the move, squeezing off a few rounds of covering fire as he runs.
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