n.

1. 反射；回响；反射光，回声[U]
   the reflection of a sound wave

   声波的反射

2. 映象，倒影[C]
   The deer gazed at its reflection in the forest pool.

   鹿凝视着它倒映在森林水池里的影子。

3. 反映；表达，抒发[C]
4. 容貌酷似的人；惟妙惟肖的事物[C]
   The girl is a reflection of her mother.

   那女孩长得和她母亲一模一样。

5. 深思，熟虑；反省[U][（+on/upon）]
   After long reflection we decided to buy the house.

   经过很长一段时间的慎重考虑，我们决定买下那所房子。

6. 想法，意见[C][（+on/upon）][+that]
7. 非议；（对名誉、品格）有损的事[C][（+on/upon）]
   Children's bad behavior is often a reflection on their parents.

   小孩的坏品行常常有损父母的名誉。

   Your accusation of my lying is a reflection on my reputation.

   你说我撒谎，这有损我的名誉。

n.

1. the fact or phenomenon of light, heat, sound, etc. being reflected.
   ▸something reflected or an image so formed.
2. a thing bringing discredit.
3. serious thought or consideration.
   ▸a considered idea, expressed in writing or speech.
4. Mathematics  the symmetry operation of inverting something with respect to a plane.