听说读写是英语学习的四种技能。
Listening, speaking, reading and writing are four skills for English study.
为了达到最好的效果，最好是制作一个综合四种技能的学习计划。
For the best results, create an agenda that combines all four areas of study.
缩减风险有四种技能和方法，分别是风险评估、识别、管理和策略。
There are four skills and means, including the risk evaluating, identifying, management and tactic.
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