if and only if 当且仅当 ; 若且唯若 ; 若且仅若
if and when 如果 ; 只有当…之时 ; 如果那时
IF-AND-ONLY-IF gate 若且唯若闸 ; 等同门
IF-AND-ONLY-IF element 若且唯若组件
IF AND OR 逻辑函数
IF-AND-ONLY-IF operation 若且唯若运算 ; 当且仅当操作
iff if and only if 有而且只有
And if you really try 如果你真的努力过 ; 如果你真去尝试 ; 假如你真的努力过
if-and-only operation 当且仅当操作 ; 等价运算
And they assume that if and when they have children, it will be even harder for them to advance in their careers.
他们认为,如果他们有了孩子,他们的职业发展会更加艰难。
These molecules burn more cleanly than gasoline, in part because they have fewer, if and, carbon-carbon bonds, and the hydrocarbons they do emit are less likely to generate ozone.
这些分子燃烧起来比汽油更清洁,部分原因是它们的碳-碳键更少或者不存在,而且它们排放的碳氢化合物产生臭氧的可能性更小。
Like many Zimbabweans he fears that ZANU-PF will resume its campaign of violence if and when any elections are scheduled.
VOA: standard.2009.09.15
Well, the company--the board of directors-- decides if and when to pay dividends to the shareholders and then the law of the state would say that they must treat them all equally.
公司,董事会,会决定何时向股东支付股利,州法规定,股东利益均等
So, so, if and when we get passed that, hopefully, and the economy starts to turn around a little bit,
如果他能通过中期选举,经济也开始好转,
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