铅是早在古代就已知的金属之一。Lead was one of the metals known to the ancient world.水银是一种已知的有毒物质。Mercury is a known poison.人们通常从已知的事实中推断未知的事实.People usually infer an unknown fact from a known fact....
Changes in the technological base of coal - fired power plants could restore their attractiveness, however.改变火力发电厂的基础技术却可能恢复它们的吸引力.Charm: The power or quality of pleasing or delighting; attractiveness.魅力,魔力: 讨人喜欢或令人愉快的能力...
Salvatore: Who said that? Gary Cooper? James Stewart? Fonda? Eh?萨尔瓦多: “这些是谁说的? 加里·库帕? 詹姆士·斯图尔特? 亨利·福达? 嗯? ”In Paris Galerie Segoura has closed, as has Salvatore Romano in Florence.在巴黎GalerieSegoura倒闭了, 在弗洛伦萨的SalvatoreRom...
佣人用毛巾揩去水.The servant sopped up the water with a towel.也许我会去水耕然后经过洒水车.Maybe I'll go to hydroponics afterward and run through the sprinklers.找个晚上我们都去水里泡泡.We'll all go for a skinny dip one evening....
Aitchison was red-carded for two fouls on Umberto.艾奇逊因两次对翁贝托犯规被红牌罚下。It is an ill bird that fouls its own nest.家丑不可外扬。The player was sent off the field because of fouls.这名运动员因屡屡犯规而被罚下场.The player was benched for many foul...
N - hydroxyethylpyrrolidone ( NHP ) was synthesized from � � - butyrolactone and ethanolamine on Y molecular sieve catalyst by two steps.以改性Y分子筛为催化剂,γ-丁内酯和乙醇胺为原料,采用γ - 丁内酯法两步合成N - 羟乙基吡咯烷酮 ( NHP ).Surface active propertie...