first period的意思
第一节（课时）
first period的例句
Conclusion: It is best to make the first - period - sewing operations to anorectal injury.
结论: 肛直肠损伤应尽量作I期缝合修补.
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Guerrilla warfare was primary in the first period and regular warfare in the second.
在前期,主要的是游击战争;在后期,主要的是正规战争.
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The final two months were a miserable coda to the President's first period in office.
总统首届任期的最后两个月非常糟糕。
《牛津高阶英汉双解词典》