without being watched; without somebody responsible for ensuring that things are safe and correct 无人监督:不受监视;没有人负责确保事情安全无误 There are many dangers in a house for an unsupervised child. 对于一个无人监管的孩子来说,房子里有很多危险。 Young children should not be left unsupervised in the playground. 小孩子不应该在无人监管的情况下被留在操场上。