Sulphur-containing compounds are often prefixed by the term "thio."

含硫化合物的名称通常有前缀“thio”。

Their code numbers are prefixed with US.

他们的代码前加上了字母US。

American members have the letters US prefixed to their code numbers.

美国会员的代码前加了字母US。

Register names are prefixed by %.

寄存器名称有%前缀。

Case 4: Declare prefixed namespaces.

案例4：声明带前缀的名称空间。