weight解释为重量可数吗

　　She shifted her weight from one foot to the other.

　　她把身体的重量从一只脚换到另一只脚上。

　　The news was certainly a weight off my mind.

　　这个消息真是去掉了我心里的重担。

　　A good mechanic is worth his weight in gold.

　　一位优秀的技工是不可多得的.。

　　Make sure that your weight is evenly distributed.

　　注意让你的重量分布均匀。

　　Finally telling the truth was a great weight off my shoulders.

　　最后讲了实话使我如释重负。