additional duty allowance的用法和样例：
- In Hesiod's works, at least, she had the additional duty of carrying water from the River Styx in a ewer whenever the gods had to take a solemn oath.
- Crude soyoil used to enjoy an import duty advantage over refined soyoil until the federal government decided earlier this month to abolish the special additional duty on all commodities.
- Absent on Temporary Additional Duty
- Temporary Additional Duty under Instruction