infectious spread的用法和樣例：
例句
- Thus, STDs have always spread, and they still continue to do so today.
因而，性傳播疾病始終在肆虐著，而且它們在今天仍然如此。 - Arbitrarily dismissing the direct link between increasing sexual promiscuity and the rapid spread of sexually transmitted diseases would be foolhardy.
武斷地無視性亂行為的增多和性傳播疾病的迅速蔓延之間的直接聯繫是魯莽的。
