“用蒸汽处理”可以翻译为 “treat with steam” 或者 “process with steam” 。
例如：
The materials are treated with steam to enhance their properties.（用蒸汽处理这些材料以提升其性能。）
We process the wood with steam to make it more pliable.（我们用蒸汽处理木材，使其更易弯曲。）