单词	瓦代加
释义	瓦代加Wadega
随便看	covalent compound covalent coordination bond covalent crosslink covalent crystal covalent hydride covalent link covalently covalent-metallitivity covalent modification covalent molecule covalent net-work solid covalent network solid covalent radius covalent ring structure covar covariable covariacne function covariance covariance analysis covariance estimation covariance estimator covariance function covariance functions covariance kernel covariance law