你认为支付宝对于付款安全起到了保障作用。
You think Alipay play the security role in the safety of pay.
从围绕中心，服务大局的角度，发挥纪检监察工作的协调保障作用；
From the perspective of serving the central task and overall situation, it can bring its coordination and assurance function into full play.
最后以高中化学课堂教学为例，揭示了发展性课堂教学评价如何对新课程目标的实现起了保障作用。
Finally, citing the case of senior middle school chemistry teaching, it is shown how developmental classroom teaching evaluation can assure achieving the new curriculum goal.
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