It was surprising when the alkali spectra showed unmistakable doublets.当碱金属光谱显示出不容怀疑的双线结构时,是令人惊奇的.The envelope is called a double of doublets.这种峰叫做双合双重线....
Singleton was a fantasist who claimed to have a karate blackbelt.辛格尔顿是个牛皮大王，他自称有一条空手道黑带。Singleton's counsel said after the trial that he would appeal...审判结束后，辛格尔顿的律师表示他将会上诉。Take a letter, Miss Singleton.帮我写封信，辛格尔顿小姐...
Fill in the blanks with verbals.用动词的非谓语形式填空.The teacher asked us to fill in the blanks with prepositions.老师叫我们在空白处填入介词.Please fill out the application form completely without leaving any blanks.请完整填写这张申请表,不要留任何空白....