(1)标准纯银的；国家标准货币的
尤指英币的。

(2)有价值的；权威的

• under conviction
• undercover agent
• underdeveloped country
• under his care
• under insurance
• underinsured-motorist coverage
• under-lease
• underletting
• under protest
• under sail
• undersheriff
• understand
• understanding
• understood
• undertake
• undertaker
• undertaking
• undertaking to keep the peace
• under-tenant
• under the age limit fixed by law
• under the influence of intoxicating liquor
• under the peace
• undertook
• Under-Treasurer of England
• under-tutor