作为讨好那些担心他们的孩子还不够努力的中产阶级家长的工具，这两个词是必要的。
The terms are necessary as a SOP to middle-class parents concerned that their children are not being stretched enough.
咱们所获得的成绩是远远不够的，咱们的经验也很不足。（形容词）
What we have achieved is far from adequate and our experience is far from enough.
她指出：我们在这一市场上这个关键词方面的覆盖度不够深广。
She points out: We go up in this one market of this keyword respect enclothe degree not quite deep wide.
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