After PE class, I had no strength to climb the stairs.
上完體育課後，我沒有體力爬樓梯。
She used all her strength to open the heavy door.
她用盡體力打開那扇很重的門。
Eating well helps you gain strength after an illness.
生病後，吃得好能幫助你恢復體力。
I don't have the strength to carry this box upstairs.
我沒有體力把這箱子搬上樓。