他死于劳累过度引起的心脏病发作。He died of a heart attack brought on by overwork.他可能会因为劳累过度而英年早逝。He might burn himself out and go to an early grave.黑格注意到了他“看上去消瘦，非常劳累”的样子。Haig noted how he "looked pinched and rather tired"....
She stood up and began to pace to and fro.她站起身，开始来回踱步。The boat was rocking gently to and fro in the water.小船在水中轻轻地来回摇荡。They travel to and fro between London and Paris.他们奔走于伦敦和巴黎之间....
The company looks poised to make a significant breakthrough in China.这家公司看来很有把握在中国取得重大突破。They announced, amid much ballyhoo, that they had made a breakthrough.在一通大吹大擂中，他们宣布自己取得了突破。God willing, there will be a breakthroug...
The barn was filled with the sour-sweet smell of fresh dung.谷仓里弥漫着新粪酸甜的气味。Her voice was as soft and sweet as a young girl's.她的声音如少女般柔美悦耳。Our spirits rallied as the bitter-sweet alcohol worked its magic.苦中带甜的酒发挥了奇效，我...