成品率的英文：
rate of finished products
yield
n. 比率，速率；费用
v. 评估；认为；划分等级；值得
- cumulative rating
累积收听率 - These bonds have an AAA rating.
这些债券的信用度是3A级的。 - To rate too low;underestimate.
低估对…估价太低；低估
adj. 精巧的；完蛋的；完成的
v. finish的过去式和过去分词
- Finishing touches
收尾工作 - It was an exciting finish.
比赛结尾是激动人心的。 - Are you finished with the scissors?
你用完剪刀了吗？
n. 产品；产物；结果；乘积；生成物
- productive farmland; his productive years; a productive collaboration.
多产的农田；他的多产年；多产的合著。 - The products are of poverty.
这批产品质量很差。 - Mechanic Products
机械产品学
