schwierig 和 schwer 有什么区别？如果难以说明的话，请教我一下例句。

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