Aspirin is synthesized through O - acylating reaction from acid and anhydride acid with anhydrous carbonate as catalyst.以水杨酸和乙酸酐为原料,采用无水碳酸钠作为催化剂经O - 酰化反应合成了阿司匹林.In 2002, we develop Photo - catalyst & electronic Ionizer A...
I see my role as being a catalyst for change.我认为我的角色是促成变革。A catalyst is a substance which speeds up a chemical reaction.催化剂是一种能加速化学反应的物质.It acts as a catalyst in the process of fermentation.它在发酵过程中起触媒的作用....
He was a game fighter even when he was losing.即使当他失败的时候, 他也是一位勇敢的战士。He was losing the fight but he would not submit.他战败了,但不屈服.As a result, they have moved to divest themselves of losing acquisitions.于是他们采取措施来摆脱那些使他们得不偿失的...
诺特和迪金森乘坐热气球上升了55，900英尺，创造了一项新的高度纪录。Nott and Dickinson set a new altitude record when they ascended 55,900 feet in their balloon.他们乘坐热气球飞越乡村和陆地.They take balloons across the countryside and across continents.我看到热气球缓缓地升上了天...
Elsie, who had been told that Maria wasn't well, plied her with food...埃尔茜得知玛丽亚身体不适，就不停地给她弄吃的。Eighteen boats plied the 1,000 miles of river along a trading route...18艘船沿着贸易航线往返于1,000英里的河面上。Giovanni plied him with qu...
Acephate is on sale principally in the form of crystal in national and international markets.乙酰甲胺磷在国内外市场上主要以高纯度原粉(晶体)形式出售.Our club was composed principally of students,with an admixture of young clerks.我们的俱乐部主要由大学生组成,外加一...
洗桑拿浴如果方法不当会有危险，浴前切忌饱食。Saunas can be hazardous if misused. Avoid a big meal beforehand.特别推荐想要放松情绪、缓解肌肉酸痛的人泡泥浆浴。The Mud Bath is particularly recommended for relieving tension and stiff muscles.海藻浴有助于身体解毒。Seaweed baths can ...