Preemphasis
n. 預加重, 預矯, 預修正\\n[電] 預強調
??? 情景例句
I want to send this letter to China, by air mail.
我想把這封信航空郵到中國。
You need an injection.
你需要打針。
It weighed nearly 500 pounds.
重達500磅左右。