A number of conservation methods have been devised for waterlogged wood . 已研究出许多种保养被水浸泡过的木头的方法。
In recent years, astronomers have detected many organic molecules in space . 近年来，天文学家们已探测到在宇宙空间中的许多种有机分子。
Many smokeless, odorless incinerators for disposal of animal carcasses are available commercially . 市场上有许多种处理尸体的无烟、无臭的焚尸炉出售。
A union catalogue is the combined catalogue of the book stocks of various libraries or branches . 联合目录是许多种图书馆及其分馆所藏图书的联合目录。
Thus, the infant science of protostar observation has a variety of tools at its disposal . 这样一来，观测原恒星这门年轻的科学，就拥有许多种可以利用的工具了。
Many species of wild birds have been found susceptible to some common viral and bacterial diseases of poultry . 许多种野鸟对一些常见的家禽病毒和细菌都有易感性。
Various alignment diagrams based on this formula have been constructed so that thickness can be determined directly . 根据该式作出了许多种线形图解，可据以直接求厚度。
Many enzymes will not work without the presence of an additional, nonprotein substance called a cofactor . 许多种酶只有在附加的称为辅因子的非蛋白质物质存在时才起作用。
In only a short time, computers have profoundly changed the way in which many kinds of work are done . 仅仅在不长的时间内，计算机就已经使许多种工作的方法进行了深刻的改革。
Treatments of pyrylium salts with various nucleophilic reagents allows the production of a host of functionalized derivatives . 如果各种亲核试剂与吡喃盐反应，就可制取许多种带官能基的衍生物。
