tip of the iceberg
a very small difficulty or problem that is actually part of a much bigger and more serious problem
[短语]
Uncle Tom Cobley and all
used for referring to a list of people or items that is frustratingly long
[短语]
everything but the kitchen sink
a collection of many different things or items, often excessive or unnecessary, that includes almost everything that could be taken or brought along
[短语]
back-of-the-envelope calculation
a rough estimate or calculation done quickly and informally, often using basic methods or assumptions

粗略估算, 快速估算

[名词]

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