subtleadj.微妙的；敏锐的；不明显的；精细的；狡猾的subtle sandstone隐伏砂岩体subtle reservoir隐蔽油气藏subtle reasoning丝丝入扣的推理subtle influence微妙的影响subtle prejudice微妙偏见subtle reservoirs隐蔽油气藏subtle philosophy深奥的哲学subtle assignment巧设任务subtle and concise婉约subtle workmanship精湛的工艺

1. There were subtle hints in his letter.
   他的信中有些微妙的暗示。
2. I solved this problem at his hint.
   在她的暗示下我解出了这道题。