ㄧㄡˊㄅㄧㄠˇㄐㄧˊㄌㄧˇyóubiǎo‑jílǐ

由表及里
  1. 外面裡面指認表面現象深入事物內涵本質 學習知識鑽研學問過程往往由表及裡由淺入深」。

to proceed from the outside to the inside, to see the essence merely by looking at the superficial appearance