The muscular exertion, however, which it required, was very severe and exhausting, insomuch that it was often selected as a punishment for slaves who had offended their masters.

• 然而，这是很费劲的，因而常用来惩罚冒犯主人的奴隶。后来人们逐渐感到应节省奴隶的劳动，减轻他们的痛苦。