| 1. | The child 's work at school is about average ..
这孩子学习成绩中常。 |
| 2. | In my job , i mix with all sorts of people .
我在工作中常和各种人打交道。 |
| 3. | Lysophospholipids are often observed in plant lipid extracts .
溶血磷脂在植物类脂提取物中常看到。 |
| 4. | A purple intemetallic phase (called purple plaque) is commonly found in bonding .
键合中常能发现一种紫色的金属化合物，称为紫斑。 |
| 5. | Ethmoid sinusitis is frequently complicated in children by orbital cellulitis and abscess .
筛窦炎在儿童中常并发眼眶蜂窝织炎及脓肿。 |
| 6. | This disposition is often used as an explanatory principle in biology and psychology .
在生物学和心理学中常将这种特性作为解释问题的原则。 |
| 7. | Vortex injection provides a form of swirl or cyclone combustion for a rocket engine similar to systems often employed in industrial furnaces .
涡流喷射在火箭发动机中产生一种涡流或旋涡形式的燃烧，与工业炉中常采用的系统相似。 |
| 8. | Road , street , lane and avenue are the most common words used in street names and are often abbreviated in addresses to rd , st , la and ave .
路、街、胡同和大街是用于街道名称中最常用的词，在地址中常缩写为Rd、St、La和Ave。 |
| 9. | The sun and the moon are often personified in poetry
诗歌中常把日、月拟人化 |
| 10. | Common mistakes made by students in science experiments
学生在科学实验中常犯的错误 |
