1.break up 破碎
The ship went aground and started to break up.
轮船搁了浅，开始破碎。

2.long stretches of 较长时间的
And there's mounting evidence that long stretches of inactivity are not good for you, even if you're not overweight and seem basically healthy.
越来越多的证据显示，即使没有超重或看起来基本健康的人，长时间的不运动也是没有好处的。