That is a very heavy thing and it will weigh you down after a while.

所以这种盾牌是很沉重的,拿一会儿你们就歇菜了

耶鲁公开课 - 古希腊历史简介课程节选

I think they're very heavy, indeed, but I don't know how much they weigh.

他们负重确实很多,但是我不知道他们的负重是多少

耶鲁公开课 - 古希腊历史简介课程节选