Just as we arrived, they set light to it.

正象我们到达，他们确定光至它。

youdao

We lost the train by about a minute; it was drawing out just as we arrived on the platform.

我们差一分钟没赶上火车；我们到达站台时，它正好驶离车站。

youdao

We arrived just as the musicians were packing up their instruments.

我们到场时乐队已开始收拾乐器了。

《牛津词典》

This happened a few times until we finally got lucky and arrived just as the walrus came up.

BBC: NEWS | Science/Nature | Walrus Watch: Reporter's log