The material is readily prepared by reaction of formaldehyde and hydrazine.这种物质很容易由甲醛和肼反应而得到.Formaldehyde slowly inactivates many viruses.甲醛能慢慢使多种病毒失去活性.Sulfur dioxide and formaldehyde both produce irritation.二氧化硫和甲醛都可产生...
Our personal space extends about 12 to 18 inches around us.我们的个人空间是周围12到18英寸的范围。The table extends to 220cm.桌子伸展后长220厘米。His domain extends for 20 miles in every direction.方圆20英里之内都是他的地产....
新老建筑上都有密密麻麻的涂鸦。Buildings old and new are thickly covered with graffiti.在罗马的建筑上与其弟争吵将其杀害.Romulus killed Remus in an argument over the building of Rome.钟楼: 独立的或附在另一建筑上的钟楼.Belfry: bell tower , either freestanding or attache...