Because if you can't make it for one thing, it means you made it for something else. Something else took priority.

如果你不能不能给某人留点时间，这个意味着你把时间花在别的事情上面了，因为这些事对于你来说优先级更高，更重要。

youdao

The best guesses are that feathers evolved either for insulation (as fur did in mammals) or for display, and that natural selection took advantage by turning them into a means of transport.

对此最好的猜测便是，羽毛的出现要么是为了护身(就像哺乳动物的毛皮)，要么就是为了作秀；此外，自然选择就择优而把某些动物的羽毛变成了它们的交通工具。

youdao

This means that it took them longer to accomplish mental tasks than it used to.

这意味着他们完成智力活动所需的时间比过去长。

youdao

It means that if I took this cell and isolated and watched it, I'd notice that it had a couple of characteristics.

意思就是如果我取这些细胞,分离并观察,我会发现它有几个特征

耶鲁公开课 - 生物医学工程探索课程节选

If I took two double stranded DNA molecules and I exposed them to certain conditions that caused them to denature, that means its native structure falls apart.

假如我把两条DNA双链,放在特定的条件下,使它们变性,变性表示使它们的原始结构分开

耶鲁公开课 - 生物医学工程探索课程节选

Of the more than 34, 000 workers who participated in GM s accelerated attrition program, most took early retirement, which means they will receive their full pension and retiree health care benefits.

FORBES: Ford's Big Buyouts

The Prison Service has instituted an organisation to look after women in prison, which they didn't have when I took over, and that means that their interests are now being looked after better.

BBC: News Online

This means if it took 15 days to drill before that now it takes 9 days, and instead of one rig working 90% of the time and punching 22 holes in a year, now 37 wells can be made.

FORBES: My Prediction Was Wrong: Why We Didn't Get To $8 Natural Gas