用作定语
▲～+n.
That is only an instantaneous action.这只是个瞬间动作。
He had an instantaneous response.他作了个瞬间反应。
用作表语
▲S+be+～
She accidentally swallowed the poison and death was instantaneous.她意外地吞下了毒药,当即身亡。

［同义词］   immediate