雅思托福写作中，最容易拿分又最容易被忽视的是”动作动词”——能精准表达因果、方法、效果的高频学术词。孤立背单词记忆效率低，把它们放进科技语境里连带记忆，一周后还能清晰回想。今天聚焦五个核心词，配合搭配句式一起消化。

leverage（v.）利用、借助已有资源

Engineers leverage existing APIs to accelerate development cycles.

facilitate（v.）促成、使……更便利

Containerization facilitates consistent deployment across diverse environments.

optimize（v.）优化，追求最优解

Profiling tools help optimize memory allocation at runtime.

robust（adj.）健壮的，能抵御异常与压力

A robust retry strategy prevents cascading failures in distributed systems.

scalable（adj.）可横向扩展的

The architecture must be scalable to handle sudden traffic spikes gracefully.

串联练习——一句话覆盖全部五词：

Modern systems must be robust and scalable, often leveraging cloud infrastructure to facilitate rapid iteration while continuously optimizing resource usage.

雅思 Task 2「科技改变社会」类题目中，这五个词出现频率极高。记住搭配比记孤立单词有效三倍——下次写作时先把这五个词框架写出来，细节填充自然顺畅。

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