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单词	Secchi disc
释义	Secchi disc noun Sec·​chi disc ˈsekē- : a reflective disc lowered into a body of water to permit measurement of the relative transparency of the water by recording the depth at which the disc is no longer visible Word History Etymology after Angelo Secchi †1878 Italian astronomer
随便看	reenjoying reenjoys reenlist reenlisted reenlisting reenlistment reenlistments reenlists reenroll reenrolled reenrolling reenrollment reenrollments reenrolls reens reenter reentered reentering reentering angle reentering order of battle sctd sctr scu scuba scuba dive

英语词典包含469781条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。