lac是什么意思 n. 紫胶, 十万, 许多[医] 虫胶, 虫漆, 乳 n. resinlike substance secreted by certain lac insects; used in e.g. varnishes and sealing wax lac的用法和例句: 1. I have a knee lac on a sixyearold in 2. 二号床有个六岁儿童的膝盖伤口需要处理 2. She's...