第一百零三句

常常这个疼痛没有明显的原因

he goes to concerts quite often

he often goes to concerts.

there is /there are /there was /there were

通常，没有明显的原因（导致）这个疼痛。

Quite often there is no obvious cause of the pain.

generally

 A cause B A导致B

cause 原因(noun)

reason

the reason for 。。。。

the cause of ......

the cause of the fire/emergency 不好的结果

cause 表示一种直接的原因

reason 中性，推过推理得到的原因，不是直接的原因

Quite often there is no obvious cause of the pain.

excuse 借口

Quite+often there is no obvious cause+of the pain.

obvious

b 轻读

v 浊辅音

上门牙轻轻的咬住你们下嘴唇，就发这个音，然后再发的时候，你们会感觉到你的嘴唇跟牙齿跟你的声带都是正振动等，

pain （n的发音 要发出来）

pay

there is