schwierig 和 schwer 的差別在哪裡？如果不好說明，請提供一些例句。

schwierig is usually used as an indicator of difficulty. As in: Die Aufgabe ist schwierig. You can also use schwer in the same manner, but schwer is the word you would use to "quantify" weight. Die Kiste ist schwer. in that case you can't use schwierig. so schwierig=hard whereas schwer=heavy/hard