Definition: looking at or listening to someone or something very carefully Level: C2
这份文件在签署前需要仔细检查。
The document needs ___close inspection before signing.
孩子们在院子里玩耍时，要密切注意他们。
Keep a ___close watch on the children while they play in the yard.
父母应该密切关注孩子的网络活动。
Parents should keep a ___close watch on their children's online activities.
