Public health expert Jill Guernsey de Zapien says farmwork often causes muscle and back issues.

公共卫生领域的专家吉尔·格恩西表示，农场的工作经常会引发肌肉和背部的一些问题。

Emil, for all his track practice, did not stand up under farmwork very well, and by night he was too tired to talk or even to practise on his cornet.

埃米尔尽管一直在练习田径，但在农活中并不能很好地站立，到了晚上，他累得说不出话来，甚至连短号练习都做不了。