我的身体很弱，我需要锻炼。
wǒde shēntǐ hěn ruò ， wǒ xūyào duànliàn 。
My body is very weak, I need to exercise.
这棵树的树枝很弱，容易折断。
zhè kē shù de shù zhī hěn ruò ， róngyì zhéduàn 。
The branches of this tree are very weak and can easily break.
他在比赛中表现得有些弱。
tāzài bǐsài zhōng biǎoxiàn dé yǒuxiē ruò 。
He performed somewhat weakly in the competition.