In there compounds, the cyclopentadiene ring has only four hydrogens.在这些化合物里, 环戊二烯环只有4个氢.Those that are aligned perpendicular to the plane are called axial hydrogens.与平面垂直定向的氢叫做直立氢.A methane molecule is composed of one c...
这些肖像作品线条简单流畅，毫无繁琐之感。The portraits are simple, uncluttered compositions.他欣赏夏克家具流畅的线条。He admires the clean lines of Shaker furniture.波浪形线条图案a pattern of wavy lines...
我们现在暂住在布朗先生的家.We are lodging with Mr. Brown.他暂住在附近的一家旅馆里.He is visiting at a hotel nearby.报纸上说10万名暂住工人将不得不被遣送回乡。The paper said that 100,000 non-resident workers would have to be sent back to their home villages....
她在书信和笔记中几乎从不提及他。She virtually never mentions him in her corre-spondence or notebooks.新发现的笔记只不过是朗的个人日志。The newly discover-ed notes are nothing more than Lang's personal journal.她坐在那儿面无表情，认真记着笔记。She sat expressionless...