「局势不稳」英文怎么说？

precarious

1. 局势或状态不稳定的、不安全的、危险的

2. 不稳的、可能会倒的、不牢靠的

My financial position is rather precarious at the moment.

目前我的经济状况不是很稳定。

He was unable to get down from his precarious position on the rocks.

他无法从岩石上摇摇欲坠的位置下来。

The intro 

(Listening Comprehension)

Yo what's up peeps ? This is Mr.Wong speaking. Here's a fun fact for you, did you know that ping pong was originated in the 19th century of England ? After dinner, some upper-middle class Victorians decided to turn their dining room tables into miniature versions of the traditional lawn tennis playing field. Several different every-day objects were employed in constructing the sport. They used a line of books as the net. Rackets were lids from empty cigar boxes or books, the ball would be either a ball of string, or perhaps more commonly, a champagne cork or rubber ball. Pretty interesting huh ? Alright, so today's word of the day is "precarious", lets check it out !

没看懂？请自己查字典！

(这才是真正的学习过程)

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