1. But at this point we have not made a decision to formally ask them, or informally ask them, to reduce staff further. 但是，目前我们还没有作出决定是否要正式或非正式地要求他们进一步减少外交工作人员。
2. According to theory, the event horizon of a black hole that is not spinning is spherical, and its singularity is (informally speaking) a single point. 依照理论，不旋转的黑洞活动视界是球形的，而且它的奇异点是（非正式说法）是单一点。
3. For investors, the greatest danger is not that America could formally default on its debts, it's that the government may informally default by unleashing inflation. 对于投资者来说，最大的危险不是美国可能正式出现债务违约，而是美国政府可能通过释放通货膨胀非正式地违约。
英英解释
adv.
1. without formality
2. with the use of colloquial expressions
3. in a casual way; at home
