1.来来去去,忽(来)忽(去);变化无定
2.来往
1.to arrive at a place and then leave it
2.to be present or happen for a limited time and then stop
1.Now take all of that and wrap it up into a controlled runtime where plug-ins can come and go dynamically, and you get OSGi (basically).
现在利用所有这些插件并将其包装到受控的运行时，插件可在其中动态进出，并且您可以获得OSGi（基本上来说）。
2.Disappointments come and go but life still moves on. With a bit of luck.
失望来了又去但是生活一直在继续。
3.Canada: small profits they do not like merchants business, do not like the prices come and go, like the long-term cooperation.
加拿大：他们商人不喜欢做薄利多销的生意，不喜欢价格变来变去，喜欢长期合作。
4.Polls come and go, as politicians like to say, but the two big parties seem to be trading fairly consistently at around six points apart.
政客们常说民意无常，但是这两大党似乎一直在你追我赶，彼此间的差距总是保持在6%左右。
5.Human friends may come and go, but a horse could be one of your most loyal, long-term buddies if you treat it right, suggests a new study.
一项新研究指出人类朋友聚散有日，但马如得到友善对待，就会成为你最忠实的老朋友。
6.The course of life is like the sea; men come and go; tides rise and fall; and that is all of history.
人的一生如同大海：人来了又去，潮涨又潮落；这就是全部历史。
7.so that you could come and go as you want. You were no longer a child.
以便于你能随时进出。你不再是一个孩子。
8.Lifetime in nothing but a chance while Ni measure this chance at have no any excuse come and go come back this section emotion too!
一生中只有一个机会当妳措施了这个机会在也没有任何藉口来往回这段感情了！
9."Things like this come and go and I don't see a direct translation into the business sector, " he said.
伍德克表示：“这种事情来来去去，我认为不会直接影响到商业活动。”
10.It is scary how the boss can come and go like the wind, especially when you are goofing off.
老闆走路无声无息，令人害怕；尤其在摸鱼的时候，最怕被他活逮。