But his cheerful mood didn't last long.

但是他愉快的心情并没有持续多长时间。

The first Gulf War didn't last long.

第一次海湾战争没有持续多久。

These happy days did not last long.

快乐的日子并没有持续多久。

His hesitation did not last long, however.

而这种援救又是那样希望渺茫。但是他的犹豫并没继续很久。

But the magic didn't last very long.

但这种神奇并不长久。

Because their batteries do not last very long.

因为他们的电池续航时间不会很长。

Previous ceasefires in Syria did not last long.

此前的叙利亚停火协议并没能持续太长时间。

Immunity to it doesn't last as long.

既往感染后的免疫力不会持续那么久。

Of course some things don't last long.

当然，有些事情不会持续太久。

" That won't last long, " said my uncle.

" 这也干不了多久，" 我叔叔说。

The brush did not last long.

猫毛刷子用不了多久。

Russian objections have been muted, but that may not last long.

俄罗斯方面反对的声音已经变弱，但这可能不会持续太久。

Collagen probably cannot last longer than that.

胶原蛋白可能不能存在超过一万年。

They do not last long and easily break apart.

花期不会持续很久，而且很快就会散开。

" Our pretty colors will not last many days longer."

“我们的漂亮颜色不会持续太久。”

It's just, they don't last very long.

只不过他们的名气并没有持续很久。

It won't last long. So make it count.

不会持续太久 要好好利用。

So it didn't last very long.

所以支撑不了很久。

Unfortunately, these stripes didn't last long.

不幸的是，这些条纹并没有持续太久。

But the bubble doesn't last long.

但是泡泡很容易爆掉。