Perphosphate
过磷酸盐
🗣️ 情景例句
What time do you usually get up in the morning?
你早上通常几点起床？
Without all the facts, Helen could only conjecture a solution.
由于事实还没有全部完备，海伦只能臆测解决的方法。
It took a very long time to carve a page for a book.
刻一页书要花费的时间太长。