“留心的”的英语可以翻译为：alert，observing，[法] observant，precautionary，jealous ...

那意味着, 头脑必须是留心的, 必须是安静的.That means, the mind must be attentive, must be silent.这一点是首先需要留心的.This should be your primary concern!虽目前不能接受你方发盘, 我们会留心的.Although we cannot accept your offer at present, we shall bear it in mind....