7. hinge on … 以…为转移，靠…转动
e.g. The claim that society’s destiny hinges on how children are socialized, while appealing in some respects, is an over-statement at best.
8. at best 最多，充其量;以最乐观的观点来看
9. collaborate to …
e.g. For example, scientists, researchers, and even computer programmers must collaborate to establish common goals, coordinate efforts, and meet time lines.
10. lend some credence to … 提供支持
e.g. While our everyday experience might lend credence to this assertion.
e.g. Recent advances in molecular biology and genetics lend some credence to this position, by suggesting that these determining physical forces include our own individual genetic makeup.
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