Distant sheet lightning without audible thunder, typically occurring on a summer night.
（通常出现在夏夜听不见雷鸣的）夏夜闪电
Example sentencesExamples
It lasted as long as a blast of summer lightning.
A market trader I met, who left school unable to spell ‘orange’, could do mental arithmetic with the speed of summer lightning.
There will be directions given which will require these things to be ready and, if you want this on, it is going to be speed of summer lightning time, I am afraid.
Higher temperatures are arriving earlier in the spring, causing earlier snowmelts, which give grasses and trees longer to dry out and create fuel for summer lightning strikes, he explains.
This elevated desert area is known for its awesome summer lightning storms and very clear night skies (accounting for the presence of several astronomical observatories).