acetals是什么意思

acetals的音标：acetals的英式发音音标为：['eɪsɪtəlz]acetals的美式发音音标为：['eɪsɪtəlz]...

The yields of other cyclic acetals were between 62.并在此条件下合成了多种环缩醛,收率62.Eight acetals ( Ketals ) were synthesized under the optimal conditions.在最佳条件下,合成了八个缩醛 ( 酮 ) 化合物.The hydroxyl groups can be changed into esters , ethe...

The hydroxyl groups can be changed into esters , ethers , acetals and ketals, etc.最常用的羟基保护基可归纳为三类:酯类 、 醚类和缩醛或缩酮类.Eight acetals ( Ketals ) were synthesized under the optimal conditions.在最佳条件下,合成了八个缩醛 ( 酮 ) 化合物.The yields ...

The walls have been horribly vandalized with spray paint.墙上被人用喷漆涂得乱七八糟。The walls had been horribly vandalized with spray paint.墙壁被用喷漆喷得一塌糊涂。The language is foul and the violence horribly realistic.语言污秽，暴力场面非常写实。...

他们的奇怪的粗鄙的生活,在他看来,仿佛象刺猖的生活一样反乎自然.And their queer, crude life seemed as unnatural as that of hedgehogs.一些物种无法承受这种猖撅的偷猎行为带来的压力.Some species may not be able to sustain the pressure from such prevalent raids....

“歧点”的拼音为：qí diǎn...

地莫昔林...

“空肠”的拼音为：kōng cháng...

She was terrified that Ronnie would kidnap Sam.她吓坏了，生怕龙尼会绑架萨姆。...the sort of people who give their children names that rhyme: Donnie, Ronnie, Connie.给孩子取Donnie, Ronnie, Connie之类押韵的名字的父母And in the fifth grade, the fastest...

hansel的现在完成时为：hanseled...

The Director is awaiting the Board’s affirmation of his nominee.董事长在等待董事会批准他提名的候选人。His nominee for vice president was elected only after a second ballot...他提名的副总统在两轮投票后才当选。...a Democratic nominee with solid support withi...

“夺回”的拼音为：duó huí...

“牛犊”的英语可以翻译为：calf ...

I advised myself to send up a little repast suitable to so delicate young palates.我心里寻思,我准备的筵席必须精美可口,适合这些年轻姑娘的口味.The aroma contributes to the flavors we discern on our palates.芳香嗅觉丰富了软腭对于口感的辨别种类.Here is a dish that will ...

Walruses have enormous appetites and hunt for food almost constantly.海象食欲极大,几乎一直在猎取食物.I normally eat seals but also can dine on walruses, mussels or even berries and seaweed.我通常吃海豹,但也能吃海象, 蚌类,甚至是浆果和海藻....

heterograft的音标：heterograft的英式发音音标为：[hetərəʊ'grɑ:ft]heterograft的美式发音音标为：['hetəroʊˌgrɑft]...

His plane made a crash-landing during a sandstorm yesterday.昨天他的飞机在沙尘暴中紧急降落。The men lost their way in a sandstorm.这些士兵在沙暴中迷了路。To keep your bearings in a desert sandstorm is impossible.在沙漠的尘暴中要想保持方位感是不可能的....

harp的一般过去时为：harped...