Unless we're all a lot more careful, the people who have died so far will be just the tip of the iceberg.

除非我们大家都更加小心，否则迄今为止已经死去的人数将只是冰山一角。

《柯林斯英汉双解大词典》

The above complaints are, I suspect, just the tip of the iceberg.

上述的这些抱怨，我觉得，不过是冰山的一角。

《柯林斯英汉双解大词典》

The goalkeeper just managed to tip the ball over the crossbar.

守门员刚好把球捅出球门的横梁。

《牛津词典》

Dodd-Frank just addresses the tip of the iceberg.

FORBES: Don't Let Banks Weasel Out Of Derivatives Reform

This does not, of course, prevent people sending out e-mails purporting to come from the IRS. IRS Tax Tip 2013-19 has just been released to remind people about this.

FORBES: Don't Be Fooled By E-Mail 'From IRS' - But Don't Ignore Their Snailmail

Poo-Pourri is just the proverbial tip of their olfactory iceberg.

WSJ: On the Scent of a Hit