外毒素对几乎所有生命形式包括人有毒. 具有 广谱 杀虫活性.It is toxic to almost all forms of life including humans. It has broad - spectrum insecticidal activity.外毒素是RNA聚合酶的抑制剂,在各个生化过程中与ATP起竞争作用.Beta - exotoxin is an inhibitor of RNA polymerase and...
“娱乐消遣是每个国民都能享受的事，”她坚定地说。"Enter-taining is something that everyone in the country can enjoy," she averred.“水手”是供台球玩家和酒徒消遣的酒吧。The Seaman was a bar for pool players and hard drinkers.我读书消遣。I read for pleasure....
Paul asked Tara out to dinner but she gave him the brush-off .保罗邀请塔拉外出吃饭，但遭到拒绝。These guests were given a brush off.客人们受到了冷遇.I wanted to keep in touch, but when I called him he gave me the brush-off.我想和他保持联系，但当我打电话给他时，他却不...