STC是沙特阿拉伯最受欢迎的电信运营商。

___STC is the most popular telecom operator in Saudi Arabia.

1920年代，STC在苏格兰推广了许多风景优美的徒步路线。

In the 1920s, the ___STC promoted many scenic hiking routes across Scotland.

我每月向救助儿童会捐款，帮助贫困地区的孩子们。

I donate to ___STC every month to help children in poor areas.