Upper-bracket taxpayers who elected to pay their tax increase in instalments must pay the third instalment by April 15.
选择分期支付增税的高额纳税人必须在4月15日之前交纳第3期税款。
《柯林斯英汉双解大词典》
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Wurzelbacher explained that he wants to buy the small plumbing business where he works, and said he was worried that would put him into the upper tax bracket of Obama's plan.