重农学派和斯密都信奉自然秩序.Heavy agronomy clique and Si Mi order of believe in nature.贾思勰被认为是农学的先驱者之一.Jia Sixie is known as one of the pioneers of farming.中国最早开始农学研究.Science on agriculture was first invented in China....
这台机器一天能冲压出2000枚硬币.This machine can punch out 2000 coins a day.这台机器每小时可冲压数百件机件.The machine can stamp out hundreds of components in an hour.高压还用来冲压金属和塑料制成的物品.High Pressure is used to stamp articles made of metal and plasti...