水箱和屋顶都需要敷设严密的保温层。Water tanks should be well lagged and the roof well insulated.从防守高度严密的监狱的集体越狱a mass breakout from a top security prison这一地区周围设有严密的安全警戒圈.There is a tight security cordon around the area....
In December 1999, Dima was shot in the chest in the village of Alkhan - Yurt.1999年12月, 迪玛在阿尔罕-尤尔特(Alkhan-Yurt)村胸部中弹.He brought us back to our yurt.他是由于看见了凶手才招祸的.While yurt has become travel, horse riding has become a kin...
在拿吃的之前，用热肥皂水把手好好地洗干净。Wash your hands thoroughly with hot soapy water before handling any food.请于今日将随函附上的捐款表格用所提供的邮资预付的信封寄回。Return the enclosed Donation Form today in the prepaid envelope provided.他把聪明都用在了犯罪上，太可惜了。Too bad...
以单质碘为催化剂合成了环戊酮乙二缩酮.Cyclopentanone ethylene ketal was synthesized with I _ 2 as catalyst.传统的缩酮化、酯化反应工业上多采用浓硫酸作催化剂.Traditional ketalization and esterification reactions are usually catalyzed by concentrated acid in industr...