9. Registration for initial visits is at counter No.3.
初诊挂号在3号窗口。
还能这样说：
Registration for first visits is at counter No.3.
Go to the third window, marked "Registry". It's for first visit.
应用解析：
run counter to 与……相抵触，违反;
over the counter 无处方;
under the counter 暗中交易，走后门
10. When will the specialist be available?
请问专家什么时候有空?
还能这样说：
When can I have an appointment with the specialist?
What time is convenient for the specialist?
应用解析：
be available for use 可加以利用;
employ all available means 千方百计，用尽所有办法
11. Do you have a registration card?
你有挂号证吗?
还能这样说：
Have you got a registration card?
Do you own a registration card?
应用解析：
a big card 风云人物，要人;大亨;
a loose card 没出息的人，放荡的人;
a strong card 有势力的人;
a sure card 万全之策;可以依赖的人
12. I want to register for my grandmother.
我想给我外婆挂个号。
还能这样说：
I'd like to make appointment with a doctor for my grandmother.
I want to check in for my grandmother.