副词无形中; 看不见地，无形地
1. 看不见地：看不见的东西invisibility | 看不见地invisibly | 看不见月亮期间的interlunar
2. 看不出地：看病seeadoctorseeapatient | 看不出地invisibly | 看不见unseendisappearanceinvisibility
3. 看不见的：invigorating 精神充沛的 | invisibly 看不见的 | involuntary 自然而然的;不随意的
4. 看不见地/看不出地：invisibility /看不见/难看见/看不见的东西/ | invisibly /看不见地/看不出地/ | invitation /招待/邀请/请帖/邀请书/劝诱/魅力/
1. For example, pilots can mark a target invisibly with a laser.
2. The stones are invisibly encased in the hinges on the thin, flat solid gold frames.
adv
1. without being seen
e.g. these organisms enter the body invisibly