形容词不可相信的; 站不住脚的; （由于太好或太糟而）令人难以置信的; 非常惊人的

形容词

1. They work with an unbelievable speed.
他们以令人难以置信的速度工作。

2. It would be unbelievable that such an honest fellow should have betrayed his friends!
这样一个老实人竟会出卖朋友，真难以置信！

3. There are many unbelievable aspects to this theory.
这一理论有许多方面不可信。

1. 不可思议的；难以置信的；极好的；非常棒的
If you say that something is unbelievable, you are emphasizing that it is very good, impressive, intense, or extreme.

e.g. His guitar solos are just unbelievable...
他的吉他独奏棒极了。
e.g. The pressure they put us under was unbelievable...
他们给我们施加的压力之大超乎想象。