Bmx
abbr. 自行车越野赛（bicycle motocross）
🗣️ 情景例句
Helped him?
帮助他？
Do you have some envelopes?
你有信封吗？
It then sends these signals down an ordinary telephone line to another fax machine, which changes the signals back into the shapes of letters.
然后把这些符号通过一条普通的电话线送到另一台传真机上，传真机又把符号变为字母形状。