您要查找的是不是：
- The lowering clouds threaten rain. 这阴霾的云层预示即将下雨。
- 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。
- Pupils with 90% or more are awarded Grade A. 满90分的学生评为甲等。
- Don't try to threaten me. I won't compromise with you. 不要威胁我，我不会和你妥协的。
- The sixth grade saw an educational film yesterday. 六年级学生昨天看了一部教育片。
- He received a failing grade on the term paper. 他的期末报告不及格。
- Red and yellow grade into orange. 红与黄混合成橘黄。
- 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。
- If we squander our fossil fuels, we threaten civilization. 如果我们浪费矿物燃料，我们就威胁文明。
- The trial flight has made the grade. 试飞成功。
- The naughty boy had to repeat the fifth grade. 这个顽皮的男孩不得不重读五年级。
- He ranks among the best pupils of his grade. 他是他们班级最好的学生之一。
- A person who has achieved this grade. 特等射手取得这种等级的人
- Balk the purpose of those who threaten us. 遏止那些威胁我们的人的目的。
- Got a bum deal on my final grade for the course. 这门课我最后得了一个不公平的分数
- He is very downhearted about the poor grade he got in school. 他对糟糕的学业成绩感到十分沮丧。
- Fast Food Scraps Threaten Rat Plague? 吃剩快餐贻鼠患?
