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1. specification做单数表示明确说明，用specifications才表示规格，规范，技术说明，清单, 明细单; 计划书 architects specification工程技术规格 2. species单复同形---The Origin of Species《物种起源》 3. speed既是名词也是动词;在做动词时候根据意思不同，对应的变化形式不同;在做加速时使用speed up做规则动词speeded，speeded;在做疾驰，急行) 的时候使用sped，sped He speeded up the car.; The car sped away. 4. spend money on/for sth; spend time doing sth expenditure on education教育经费;revenue and expenditure收支 dispense是一个不及物动词---dispense with节省，省却，没有...也行，不需要 Can we dispense with the formalities? 咱们能免去这些礼节吗? A lazy student can dispense with the original and use the English text as a trot. 懒学生可以把原文抛在一边而用英文直译本. Indispensable比necessary语气强烈 Compensate sb for sth---Nothing can compensate for the loss of the opportunity. In compensation for作为...的补偿，以弥补... a sum of money paid in compensation for loss or injury. 补偿损失或伤害的钱款. In partial compensation for these problems, however, we obtain the benefits of fuller local government. 然而，作为对这些问题的部分补偿，我们得益于比较完整 | 
