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...
苦中带甜的酒发挥了奇效，我们的精神随之振奋起来。Our spirits rallied as the bitter-sweet alcohol worked its magic.如果你喜欢吃甜的就多加点蜂蜜。Add more honey if you have a sweet tooth.我们常常吃了开胃的菜,接着就吃甜的菜.We often follow the savoury course with a sweet course....