down grade

基本解释

The economic situation in these countries is on the down grade.
这些国家的经济形势每况愈下。
This paper discusses the security problems of how to ensure air-filled time in periodic train braking and low-speed running problem for heavy haul trains on the long heavy down grade.
对长大下坡道区段开行重载列车如何保证周期制动时列车制动机充风时间及低速慢行等安全问题作了论述，提出了相应的验算评价方法和机车动力制动故障时安全运行的应急措施。
But first I had to ask him about S&P lowering the outlook for Berkshire Hathaway debt (which is rated AA+) from stable to negative in the wake of the credit down grade of U.S. Treasuries.
但鉴于标准普尔（S&P）在调低美国国债的信用评级后不久，又将伯克希尔•哈撒韦公司的债券评级（被评为AA+级）预期从“稳定”调低至“负面”，因此，首先我要征求一下他对这件事的看法。

Then, with the unstoppable momentum of a train going down a grade, the service picked up speed.
NPR: Excerpt: 'The Prince of Frogtown'
In the year to date, likewise, returns are higher down the grade.
FORBES: Connect
The down market grade is awarded in a similar fashion.
FORBES: The Forbes Fund Grading System

If something is downgraded, it is given less importance than it used to have or than you think it should have.
If someone is downgraded, their job or status is changed so that they become less important or receive less money.

降格
Chapter I: This part analyzes the theoretical foundation of Goddess downgrade.
第一章分析了认为女神降格的理论基础。
计算机科学技术
使降职
降级
降低密级