The physical properties of rubber accelerator 2 - mercapto benzothiazole and main methods for its preparation are introduced.介紹橡膠硫化促進劑 2- 巰基苯并噻唑的物理性質和主要的制備方法....
Every man thinks his own geese swans.每個人都以為自己的東西了不起。In the fall we sometimes hear honks as a flock of geese flies south.到了秋天,有時我們能聽到南飛雁群的叫聲.All one's geese are swans.自吹自擂，王婆賣瓜,自賣自夸。The Thames was in spate, with floc...
And what is that pearl of wisdom supposed to mean?那番精辟見解到底是什么意思呢？They are supposed to be here at about half four.他們應該在4點半左右到達這里。"Is she supposed to work today?" — "Nope, tomorrow."“今天她上班嗎？”——“不，明天上。”...