My brother can help. At least we can rely on him. 我哥哥可以帮忙。至少我们可以信任他。

Sometimes you just have to rely on your own judgment. 有时侯你只需要相信你自己的判断。

rely on sb/sth to do sth Can we rely on him to support us? 我们可以指望他来支持我们吗？

an industry that relies heavily on government contracts 一个非常依赖政府合同的产业

rely on sth to do sth The museum relies on voluntary donations to keep open. 博物馆依赖自愿捐助来维持开放。