Asymmetric 1, 3 - dipolar cycloaddition can be strongly catalyzed by chiral oxazaborolidines.手性唑硼烷酮能够催化不对称1, 3偶极加成反应并取得很好的效果.The cycloaddition itself is the slow step.环化作用本身是慢的一步....
Corrosive and bitingly trenchant; cutting.恶意讽刺的且十分锐利的; 讽刺的.a bitingly cold wind.凛冽的寒风The doctor pushed open the door. The interior was silent and bitingly cold.医生推开大门, 屋里毫无动静,寒冷砭骨.There was a long pause and he spoke draw...
Annette's performance as Eliza Doolittle in "Pygmalion" was truly memorable.安妮特在《卖花女》中扮演的伊丽莎·杜利特尔这个角色实在令人难忘。The smoothness of the flight was memorable.这次平稳顺利的飞行令人难忘。a truly memorable occasion非常难忘的时刻...
They were in the back of the kitchen, boning racks of lamb.他们在厨房后面剔羊肋排骨.Make sure that you do not pierce the skin when boning the chicken thighs...剔鸡腿骨时切勿戳破外面的皮。Still another condition is called a boning facturebowing fr...