The new hearing aid fits unobtrusively into the outer ear.这种新的助听器塞在外耳道里，并不显眼。They slipped away unobtrusively.他们悄悄地溜走了。He was sitting unobtrusively in a corner.他毫不起眼地坐在角落里。Like a chameleon, he could merge unobtrusively into the background.他就像一条变色龙，可以神不知鬼不觉地隐藏在背景中间。