To be prone to something, usually something bad, means to have a tendency to be affected by it or to do it.
For all her experience as a television reporter, she was still prone to camera nerves.
尽管有丰富的做电视记者的经验,她仍然容易在镜头前紧张。
People with fair skin who sunburn easily are very prone to skin cancer.
那些皮肤白皙并易晒伤的人很易患皮肤癌。
If you are lying prone, you are lying on your front.
Bob slid from his chair and lay prone on the floor.
鲍勃从椅子上滑下来,面朝下躺在了地板上。
-prone combines with nouns to make adjectives that describe people who are frequently affected by something bad.
the most injury-prone rider on the circuit.
赛车道上最容易受伤的车手。