F2F Class Notes October 27th (Ben)
Vocabulary
few 少 =/= many 多
Very few Chinese people have a beard like yours.
Optical systems have many mechanical parts, convex and concave lenses.
凹凸 concave and convex
A concave lens diverges light, whereas a convex lens converges it.
戴眼镜 to wear glasses
Young people usually wear concave glasses.
owner = someone who owns something 拥有者
I am the owner of a BMW.
prototype 原型
The optical systems we work on are prototypes.
test 测试
I tested an optical system today.
We test lenses for problems.
lucky 幸运
Today was a lucky day. I solved all problems fast.
a lab 实验室
We assemble the optical system to test it in the lab and find problems in the lenses.
a lab coat 实验服
We need to wear a lab coat when we are in the lab.
the air con 空调
Sometimes it’s hot and we need to turn on/off the air con.
防止 avoid = protect against
We wear lab coats to avoid dust.
We wear lab coats to protect against dust.
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