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。
