词汇讲解：

1. speed vt. 急行，加速
例句：Fresh air and nutritious food will speed his recovery.
呼吸新鲜空气,吃有营养的食物会促进他身体的康复。

2. establish vt.建立，创建
例句：He is planning to establish a home.
他正计划建立家庭。

3. arrest vt.逮捕，拘捕;止住
例句：Attempts are being made to arrest the spread of the disease.
现正设法遏止这种疾病的蔓延.

4. suspect vt.猜疑（是）;怀疑
例句：His motives were suspect with others.
他的动机受到其他人的怀疑。


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