服输的英文：
admit defeat

参考例句：

Never say uncle
嘴硬,不肯服输、不肯承认

"But Kendal was a fighter
"但肯德尔是个不肯轻易服输的人。

admit是什么意思：
v. 承认；招供；准许进入

Children are admitted free.
孩子们免费入场。

Bournemouth, you have to admit, has style.
你不得不承认伯恩茅斯是个很有格调的地方。

Children unaccompanied by an adult will not be admitted.
儿童无成人带领不得入内.

He was admitted into the school .
他已被准许入学。

Journalists are rarely admitted to the region.
新闻记者很少获准进入该地区。

defeat是什么意思：
v. 击败；使困惑；使失败，阻挠，挫败
n. 失败；击败，战胜

Victory of defeat
不成功,便失败

Their defeat was not inevitable.
他们被击败是不是不可避免的。

sting of defeat
失败的痛苦

The team refused to resign themselves to defeat/to being defeated.
该队不甘失败.

They were defeated all hollow.
他们被彻底打垮了。