When it's something we're glad about, we use 'at last' like this too, but not lastly.

当我们为某事感到高兴时，我们也会像这样使用“at last”，但不会用“lastly”。

I told myself I should be glad about it.

我对自己说应该感到高兴才对。

I don't want you to be glad about it.

我可不要你高高兴兴地去死。

She wasn’t leaving after all. He was glad about that.

【glad，gladness】她到底还是不走了，他很开心。

I've heard that the sleeping cars are pretty comfortable, too, so I'm glad about that.

我听说卧铺车厢也很舒服，所以我很高兴。

The only thing in the whole world to be glad about was that Mary had to fill the chip pan all by herself.

全世界唯一值得庆幸的是玛丽不得不一个人填满薯条盘。

We let him wrap us in his arms and, for a brief insane moment, I was glad about whatever had happened that night.

我们停在他怀里，有那么一会儿，我竟然发疯似的觉得很高兴，而不管当晚究竟发生了什么事情。

By then a little of the money from Carrie had begun to flow and I was able to help with some of the medical expenses—there was that much to be glad about.

那时候《魔女嘉丽》的一部分版税已经到了手，我得以帮忙付了部分医药费用——至少这点我不遗憾。

He was as true as any man in the world. He'll never forget. I came a thousand miles to stand here tonight. But I'll be glad about that, if my old friend comes too.

因为他一直都是世界上最忠诚，最讲义气的朋友。他不会忘的，我千里迢迢赶来，只要能见他一面，就值得。"