be sure of oneself 隐藏摘要 
有自信心
be sure and... 一定要…
be sure of oneself 有自信心
for sure 确实,毫无疑问地
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自信
sit up 坐立;(从躺卧姿势)坐起来
be sure of oneself 自信
a scrap of 少量的,一点点
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