iota

1. QUANT If you say that there is not an iota or not one iota of something, you are emphasizing that there is not even a very small amount of it. 一點(diǎn)兒; 極小的量[with brd-neg, QUANT 'of' n-uncount] [強(qiáng)調(diào)]

He's never shown an iota of interest in any kind of work. 他對(duì)任何一種工作都沒有表現(xiàn)出一點(diǎn)兒興趣。

2. PHRASE You can use an iota or one iota to emphasize a negative statement. Not an iota or not one iota means not even to a small extent or degree. 絲毫的[with brd-neg, PHR after v] [強(qiáng)調(diào)]

Our credit standards haven't changed one iota. 我們的信貸標(biāo)準(zhǔn)從未有絲毫改變。