celerity

迅捷（名词，正式）

(noun, FORMAL) A condition of great speed; swiftness.

EXAMPLE: Our new employee impressed us with the celerity with which he executed his daily tasks.

新员工执行日常任务十分迅捷，给我们留下了深刻印象。

cold comfort

无益的安慰

Very limited, unsatisfying consolation or empathy.

EXAMPLE: When my closest friend and business partner died unexpectedly, I became sole owner of our prosperous firm, but it was cold comfort because I missed him so much.

当我最亲密的朋友和商业伙伴意外去世时，我成了我们兴旺的公司的唯一老板，但是这种慰藉没有什么意义，因为我实在太想念他了。