sulfur trioxide的用法和樣例：
例句
- The new toluene sulforation tcehnology and the structure off the jetting loop sulfonation reactors of the gaseous sulfur trioxide were presented.
主要介紹了氣相三氧化硫甲苯磺化新工藝及噴射環(huán)流磺化反應器的結構。 - The direct reaction between sulphur dioxide and oxygen to give sulphur trioxide is slow and requires a catalyst.
二氧化硫與氧氣直接反應生成三氧化硫是很慢的，且需要催化劑。
