词汇	beam sagging
释义	beam sagging 梁下垂
随便看	human-powered human-powered aircraft human-powered flight human powered search human-powered search human powered search engine human power evaluation systems human power investment Human power of health technique human pox vaccination human-pox vaccination human practice ontology Human predicament human pregnant X receptor human prepro CNP human prepro-CNP human preproenkephalin human preproenkephalin gene human pressure human prevent project human pride Human pride is human weakness Human primary hepatic cell Human primary hepatic cells human primates