The chairman introduced the speaker to the audience.

【知识拓展】introduce的名词形式是introduction，意为"介绍"，多作不可数名词，有时候也作可数名词；还可译为"引论；导言；概论"，是可数名词。如：

My next guest needs no introduction (= is already known to everyone).

Before the meeting began I made the necessary introductions.

The introduction in a book tells us what the book is about.

3. approach & touch

【课文原句】Mr Garcia approaches Mrs Smith, touches her shoulder and kisses her on the cheek. (P26)

【名师点拨】(1) approach vt. & vi. 意为"接近；靠近；走近"。approach作名词讲时，表示"方法；步骤；途径；接近"，用于make approaches to sb，表示"想法接近（认识）某人"。如：

We could just see the train approaching in the distance.

It began to rain when he approached his home.

The time is approaching when we must be on board.

All approaches were blocked because of the accident.

A new approach should be found to solve the matter.

I am not good at making approaches to strangers.

(2) touch作动词讲，意为"接触；触摸"；touch作名词时，除了"接触；触摸"的意思外，还有"联系"的意思。如：

Visitors are not allowed not to touch the exhibits.

keep in touch with 同......保持联系

get in / into touch with 和......取得联系

lose touch with 和......失去联系

be out of touch with 同......失去联系

4. express

【课文原句】... they also express their feelings using unspoken "language" through keeping physical distance, actions or posture. (P26)