底线；插图说明；在…下划线；强调的英文

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• 底线:    bobbin thread; dos ...
• 插图:    illustration; figu ...
• 说明:    explain; illustrat ...
• 在:    exist; be living
• 下:    below; down; under ...
• 划线:    lineation; marking ...
• 强调:    stress; emphasize; ...