Retinometer
視網膜計
??? 情景例句
I brought you a chicken sandwich and a glass of milk.
我替你帶來一份 肉三明治和一杯牛奶。
Which would you prefer, a smoking seat or a non-smoking seat?
你喜歡哪種，吸煙座還是禁煙座呢？
What are those?
那些是什么？