您要查找的是不是：
- The news comes from a reliable source. 这消息来自可靠的来源。
- Pupils who pass the test will be promoted to the next higher grade. 小学生只要考试及格就会升到高年级。
- He's not in the first grade as a musician. 他不是第一流的音乐家。
- Business is now on the up grade. 目前生意蒸蒸日上。
- My wages are the principal source of my income. 薪金是我收入的主要来源。
- Pupils with 90% or more are awarded Grade A. 满90分的学生评为甲等。
- Solar energy is a new kind of source of energy. 太阳能是一种新型能源。
- The sun is the ultimate source of energy. 太阳是能量的最基本来源。
- The sixth grade saw an educational film yesterday. 六年级学生昨天看了一部教育片。
- A source of irritation or annoyance. 令人生气的事或者引起烦恼之事
- He received a failing grade on the term paper. 他的期末报告不及格。
- The groundwork or source of something. 基础，根源某事物的基础工作或根源
- Red and yellow grade into orange. 红与黄混合成橘黄。
- Where is the source of the Rhine? 莱茵河发源于何处？
- The twins will enter the fourth grade this fall. 这对双胞胎今年秋季将升到四年级。
- Their marriage is on the down grade. 他们的婚姻关系每况愈下。
- The trial flight has made the grade. 试飞成功。
- He's been a source of discord and worry. 他成为不和和烦恼的根源。
- The naughty boy had to repeat the fifth grade. 这个顽皮的男孩不得不重读五年级。
- A source of harassment, annoyance, or pain. 使人痛苦的东西骚扰，烦恼或痛苦的来源
