词汇精解:
reflection:名词 n.
1.反射;回响;反射光,回声
the reflection of a sound wave
声波的反射
2.映象,倒影
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
4.容貌酷似的人;惟妙惟肖的事物
The girl is a reflection of her mother.
那女孩长得和她母亲一模一样。
5.(~+on/upon)深思,熟虑;反省
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.(~+on/upon)(~+that)想法,意见
7.(~+on/upon)非议;(对名誉、品格)有损的事
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。

tragedy:名词 n.
1.悲剧体裁
Tragedy is a type of literature that involves death, suffering or disaster.
悲剧作品是文学的一种,内容常涉及死亡,不幸和灾难。
2.(一出)悲剧
Shakespeare's Hamlet is one of the best known tragedies.
莎士比亚的《哈姆雷特》是最有名的悲剧之一。
3.悲剧性事件;惨案;灾难
The traffic accident is really a tragedy.
这次车祸真是个悲剧。
4.悲剧因素

词组辨析:
face with与face up to的区别:
face with:面对...后面多接名词，有时也可以接doing；face up to中文意思是，勇敢的对付或接受；后面接doing，或是接名词。
I was faced with lots of difficulties.
我那时候需要面对很多困难．
Don't force him face up to that problem.
别强迫他正视那个问题。
He faces up to doing his responsibilities.
他很坚毅地承担自己的责任

introduce的用法:
introduce其后跟双宾语时，只能用“及物动词＋直宾＋to＋间宾”结构而不能用“及物动词＋间宾＋直宾”结构，也就是说不能用introduce sb sth。只能是introduce sth/sb to sb.
Let me introduce you to john.
让我给你介绍以下约翰。