It would be unthinkable to ask him to do that.
叫他做那件事是毫无可能
。
, 不能接受, 不可想像, 
置信;;
;
恐惧,使惊骇;;;;;;震惊;, 必然发生;It would be unthinkable to ask him to do that.
叫他做那件事是毫无可能。
It is quite unthinkable that a child like him can speak a foreign language so fluently.
像他这样孩子居然能流利地说一种外语, 真是
置信。
Defeat is unthinkable.
战败是不可能。
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