Pertest
percolation test(ing) 渗透试验
🗣️ 情景例句
When was the last time?
最近一次是什么时候？
Care and diligence bring luck.
谨慎和勤奋，带来好运气。
The Cutty Sark was one the fastest sailing ships that has ever been built.
“卡蒂萨克”号是帆船制造史上建造的最快的一艘帆船。