... permuted index 循环置换标题索引 peroxide of lead过氧化铅 perpendicular magnetic recording 垂直磁记录 ...
双语例句
1
They admit that in the production of their product leadperoxide is used.
他们承认,他们的产品过氧化铅生产使用。
2
The sample is treated with hydrochloric acid and hydrogen peroxide. The analytical conditions have been studied. The elements of coper, iron and zinc can be determined in the presence of lead and tin.