例:Bob spent fifteen months alone on his yacht. Ann， meanwhile， took care of the children on her own. 鲍勃独自在他的游艇上待了十五个月。
好了废话不多说，我们开启今日学习:今天我们学习的单词是:persistent。live in a state of persistent anxiety and pain——生活在持续焦虑和痛苦的状态中。
