Pfs
abbr. porous friction surface(d) 渗透摩擦面
🗣️ 情景例句
Biology and mathematics.
生物学和数学。
Strike while the iron is hot.
见机行事。称热打铁。
At that time, however, she was not only the largest ship that had ever been built, but was regarded as unsinkable,
当时，这艘轮船不仅是造船史上建造的最大的一艘船，而且也被认为是不会沉没的。