紧密地 接近地 严密地 亲近地英释中释
The detective watched him closely , waiting for a reply..侦探紧盯着他看，等着他回答。
Details of the program are a closely-guarded secret ..该项目的细节是严格保密的。
closely packed,密堆积的
be closely related with,与...有密切联系
