Heterosexual contact is responsible for the bulk of HIV transmission.

异性间的性接触是造成大多数艾滋病病毒传播的原因。

The society maintains that the majority of cross-dressers are heterosexual.

社会仍持有大多数穿异性服装的人是异性恋的观点。

It doesn't matter whether people are heterosexual or homosexual.

一个人是异性恋还是同性恋无关紧要。