Long-awaited IPOs from a host of tech unicorns turned out to be damp squibs, mostly.
damp squib，指令人失望的事。 damp为“潮湿的”，squib为“a small exploding firework”，本以为“潮湿的小鞭炮”，常用来比喻“令人失望的事”，替换disappointment，nothing more than a damp squib，turn out to be a damp squib。
a host of，诸多的。而a dearth of / a lack of意思是not enough，There was a dearth of reliable information on the subject.
tech unicorns：科技独角兽。black swans：“黑天鹅”指难以预测的低概率事件。
The long-awaited Game of Thrones S8 turned out to be a damp squib.
Waymo, the Alphabet subsidiary widely seen as industry leader, committed itself to launching driverless-taxi service in Phoenix, where it has been testing its cars, at the end of 2018.
autonomous vehicle / driverless car：无人驾驶汽车
commit oneself to doing ：致力于做某事
The live-action film doesn’t even hold a candle to the animated film.
not hold a candle to，be inferior to，远不能和…相提并论。
I have been committed myself to holding his birthday party since two months ago, gathering a host of autonomous vehicles from every tech unicorn to greet this long-awaited moment. However, he thought it’s nothing more than a damp squib, not even hold a candle to his third birthday party.