中翻英：没等到这人解释，两个女孩就跑掉了。(instead of)

Instead of waiting for the explaination of that man, the two girls run away !

Before this man could give an excuse the two girls had run away.
如果非要用instead of的话，可以考虑
The two girls ran away instead of listening to his excuse.

Instead of waiting for the explaination of that man, the two girls run away

Instead of waiting for the explaination of that man,the two girls away went

The girls two ran away ,instead of listening to that gay'explaination.

Instead of waiting for the explaination of that man, the two girls run away