Stdfile
标准文件
🗣️ 情景例句
Are you sending it by regular or by speed?
你要寄平信还是快递？
It's faster but more expensive to ship goods by air.
空运较快但运费较高。
he hardly ever used it, preferring always to go on foot.
但却很少使用，常常喜欢以步代车。