B—B—C—012 C 3 5{A}光度是光作用于人眼所引起的明亮程度的感觉。

A—B—F—004 B 3 5{A}A: When will Flight MU523 be ready for check-in?B：{.XZ}.

A—B—F—004 B 3 5{A}A:{.XZ}?B： The check-in hasn’t begun yet.

A—B—F—004 B 3 5{A}{.XZ} is the boarding time for your flight?

A—B—F—004 B 3 5{A}A: What’s the check-in time for my flight?B：{.XZ}.

A—B—F—004 B 3 5{A}A: Where’s your destination?B：{.XZ}.

A—B—F—004 B 3 5{A}A: Are you going to take a domestic or an international flight?B：{.XZ}.

A—B—F—004 B 3 5{A}A:{.XZ}B： Flight CA933.

A—B—F—003 B 3 5{A}The number code of Aeroflot Russian International Airlines is{.XZ}.

A—B—F—003 B 3 5{A}The two letter code of Alitalia is{.XZ}.

A—B—F—003 B 3 5{A}{.XZ}is the carriage of goods from place to place by air.