The optical design principle of an objective refractometer as well as the measurement of myopic, hyperopic, astismatic and presbyopic parameters are introduced.
介绍了一种客观验光仪光学设计方案的基本原理，远、近视，散光和老花的测量方法，并对测量误差进行了分析。
Traveling among a group of tourists.
和一群观光客一起旅游
Are visitors allowed to come on board?
观光客都允许坐船吗？
Few tourists stop here.
很少观光客在这停留。
I'm a tourist and I have a passport.
我是个观光客，我有护照。
The place was overcrowded with tourists.
那个地方挤满了观光客。
There are a lot of tourists there.
那里有许多观光客。
Those are swarm of sightseers.
那是一大群观光客。
The guide shepherded the tourists around.
导游带观光客四处游览。
Each year, many foreign tourist visit taiwan for sight - seeing.
每年有许多外国观光客到台湾观光。
A mugger demanded the tourist's money.
强盗向那位观光客索取金钱。
The beach was touristy in summer.
夏季海滩为观光客所喜欢。
A camera signal a tourist.
身背一部相机是观光客的标志。
Shopkeepers who hiked their prices for the tourist trade.
店铺老板们对观光客们大幅提价
You become a spiritual tourist,bustling about and never getting anywhere.
你便成了求道的观光客，忙得徒劳无功。
The second driver would be Chinese tourists.
第二个推动因素将是大陆观光客。
Oh, I'm a tourist. May I go inside and look around?
哦，我是个观光客。我能进去看看吗？
Peggy: Well, that just12) politics, and I'm just a13) tourist.
佩姬：嗯，那是政治的事，我只是个观光客。
If so, what can a tourist do in New York?
如果是的话，观光客在纽约能干嘛呢？