Despite its many technical obstacles, five out of seven test interceptions have been successful.
尽管存在很多技术困难，7项拦截器的测试中已经有5项能成功。
The triangle tester example has a total of seven test methods, but it has twenty-three distinct tests.
三角形测试实例一共有七个测试方法，但有二十三个截然不同的测试。
John Glenn was the last surviving member of a group known as "the Mercury Seven, " test pilots who, in 1959, were chosen to become America's first astronauts.
格伦曾是“水星计划七人”最后一位健在者，这些试飞员于1959年被选为美国首批宇航员。
John Glenn was the last surviving member of a group known as "the Mercury Seven, " test pilots who, in 1959, were chosen to become America's first astronauts.
格伦曾是“水星计划七人”最后一位健在者，这些试飞员于1959年被选为美国首批宇航员。
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