1. stimulus n. 刺激

    Her word of praise is a stimulus to work harder.

    她赞扬的话鼓舞人工作更努力。

    2. straightforward a. 坦率的

    a straightforward reply 一个坦率的回答

    His straightforward， modest manner took into camp everybody he knew.

    他爽直而谦虚的态度使所有认识他的人都上了当。

    3. stubborn a. 倔强的

    The child has a stubborn temper.

    这个小孩脾气执拗。

    4. stumble v. 绊倒

    I stumbled over a tree root.

    我在一个树根上绊了一跤。

    5. subordinate a. 从属的

    She works in the subordinate hospital of our universtiy.

    她在我们学校的附属医院工作。

    6. subscribe to v. 订阅

    I subscribe to" Reader's Digest" magazine.

    我订了《读者文摘》杂志。

    7. subsidy n. 补贴

    It's the old and the poor who suffer worst when subsidies are cut.

    补助津贴一削减，最吃苦头的就是那些老人和贫民。

    8. subtle a. 微妙的

    the subtle difference of the two words 两个单词微妙的区别

    There were subtle hints in his letter.

    他的信中有些微妙的暗示。

    9. supervise v. 监督

    I supervised the workers loading the lorry.

    我监督工人把货物装上卡车。

    10. suppress v. 镇压； 抑制All these movements were suppressed by the warlord government.

    所有这些运动都受到军阀政府的镇压。

    He couldn't suppress his anger.

    他简直怒不可遏。