continual和continuous在用法上有什么区别?

continual
KK: []
DJ: []
a.
1. 多次重复的,频频的[B]
He still smokes despite the continual warnings of his doctor.
尽管他的医生多次警告,他还是抽烟.
continuous
KK: []
DJ: []
a.
1. 连续的,不断的
The brain needs a continuous supply of blood.
脑需有不断的血液供给.