星级典句:
第一句: Would you please weigh this for me?
请帮我称一下这个邮件好吗？
A: Would you please weigh this for me? I'd like to send it by airmail.
请帮我称一下这个邮件好吗？
B: It's 2.3 dollars. Here are the stamps and sticker, be sure to paste these stamps and an "Air Mail" sticker on the envelope.
共2.3美元，这儿有邮票和贴纸，务必把这些邮票和那张有“航空有机”的贴纸贴在信封上。

第二句: Your letter is overweight.
你这封信超重了。
A: Your letter is overweight. You must pay extra for it.
你这封信超重了，你必须额外付钱。
B: How much do I have to pay?
我需要付多少？
A: 40 cents for it.
40美分。

其他表达法:
What's maximum weight allowed?
最高重量限额是多少？
Can you weigh this?
你能撑一下这个吗？