The carbon microfiltration membranes were prepared by pyrolysis of a home - made thermosetting phenol - formaldehyde ( PF ) resin .实验合成了球形热固性 酚醛树脂 微粒,并以此为原料制备了微滤炭膜.The preparation and property of urea - formaldehyde resi...
他听说奖杯已经被卖掉了。He had heard that the trophy had been sold.他的名字刻在奖杯上。His name was inscribed on the trophy.那只奖杯是该公司很珍惜的奖品.The cup is a cherished trophy of the company....
Swords brandished and banners waved.刀剑挥舞,旌旗飘扬.The jester brandished his bauble.丑角挥动手中拿着的木棒.The old man brandished his walking stick at the menacing dog.老人对着那条要咬他的狗挥舞手杖吓它走....