escape 侧重逃跑的结果，不强调逃跑时的匆忙或危险情况。
flee 书面用词，侧重指逃跑时动作匆忙，多含惧怕之意。
fly 含义与flee相同，但系非正式用词。
get away 口语用语。侧重指犯罪分子从现场逃跑或被捕时逃走。
run away 口语用语，强调动作迅速。
参考例句
1. A large bird flew past us. 一只大鸟从我们这儿飞过。
2. Rockets can fly far out into space. 火箭能够飞出地球进入太空。
3. Can his machine fly? 他的机器能飞吗？
英英解释
n.
1. two-winged insects characterized by active flight
2. flap consisting of a piece of canvas that can be drawn back to provide entrance to a tent
3. an opening in a garment that is closed by a zipper or by buttons concealed under a fold of cloth
4. (baseball) a hit that flies up in the air
5. fisherman's lure consisting of a fishhook decorated to look like an insect v.
1. travel through the air; be airborne
2. move quickly or suddenly
3. fly a plane
4. transport by aeroplane
5. cause to fly or float
6. be dispersed or disseminated
7. change quickly from one emotional state to another
8. pass away rapidly
9. travel in an airplane
10. display in the air or cause to float
11. run away quickly
12. travel over (an area of land or sea) in an aircraft
13. hit a fly
14. decrease rapidly and disappear adj.
1. (British informal) not to be deceived or hoodwinked
