希尔伯特第十四问题 hilbert's fourteenth problem
四色问题 four color problem ; Four-color problem
十四的质问 Chapter Sixty Six
四处询问 ask around
四阶边值问题 fourth-order boundary value problem ; fourth-order bvp
存在四个问题 There are four problems
四色方柱问题 Instant Insanity
第四个问题 The fourth issue
奇异四阶边值问题 fourth order singular boundary value problem ; singular fourth-order boundary value problem
人生的四个经典问题 Four Classical Questions in Life
研究人员通过一个简单的“四问测试”来评估研究对象的快乐程度。
我儿子现在四岁。他老是问为什么爸爸妈妈不住在一起了。
Our son is now 4 years old, and he's asking questions about why his Mommy and Daddy don't live together anymore.
问：据报道，中东问题“四方机制”将派员于本月26日在耶路撒冷分别与以色列和巴勒斯坦官员就重启直接和谈举行会谈。
Q: it is reported that the Middle East Quartet will send officials to Jerusalem on October 26 to hold talks with the Israeli and Palestinian sides respectively on the resumption of direct peace talks.
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