One of the biggest grouches is the new system of payment.人们抱怨最多的一点就是这种新的支付方式。One of my main grouches against the council is that they don't run enough buses.我对市议会不满,主要是投入营运的公共汽车不够用.Keep only cheerful friend. The gro...
他们曾在一处泉边停歇休息。They had stopped by a spring to refresh themselves.棕榈泉有高档的餐厅和奢华的夜生活。Palm Springs has ritzy restaurants and glitzy nightlife.这口泉号称从不干涸。The fountain is reputed never to dry up....
a grey, cloudy day灰暗多云的天空Only a tiny patch of blue was visible in the cloudy sky.多云的天空中只见到一小块儿湛蓝.Bob always enjoys sailing, even though the weather is cloudy.鲍勃总是很喜欢航行, 即使空中乌云密布....
方法: 用溴代及胺化反应合成了四甲基吡嗪衍生物.METHODS: The target compound was prepared by the bromination and amination reaction.用溴—甲醇溶解Al_2O_3, 其回收率在91%以上.If Al 2 O 3 is dissolved by Br 2 - CH 3 OH, its Recovery rate is above 91 %.用溴比用氯时产出率...