Question

haphazard 【haphazard】adj. 偶然的；随便的It is haphazard timetable; sometimes lessons are held and sometimes they aren't.这是个不定的课程表；有时有课；有时没课。

Accepted Answer

[hæp'hæzərd] 
haphazarddependent upon or characterized by chance
Anything haphazard is random, disorganized, slipshod, or hit-or-miss. A tent erected haphazardly might look more like a big nylon bag of dirty laundry than a place to sleep.
Ever heard the expression "I'll hazard a guess?" In it, the word hazard means "chance," as in "take a chance."  Think of the hap in haphazard as short for "happen." Combine hap- and -hazard and you get something that happens (or appears to have happened) by chance. If you approach a math problem with haphazard reasoning, you're likely to get it wrong.
All forms of 'haphazard' will appear on average once every 3177 pages.haphazardhaphazardlyhaphazardness

Front	haphazard
Pron	[hæp'hæzərd]
Back	【haphazard】 adj. 偶然的；随便的 It is haphazard timetable; sometimes lessons are held and sometimes they aren't. 这是个不定的课程表；有时有课；有时没课。
Vocab	haphazarddependent upon or characterized by chance Anything haphazard is random, disorganized, slipshod, or hit-or-miss. A tent erected haphazardly might look more like a big nylon bag of dirty laundry than a place to sleep. Ever heard the expression "I'll hazard a guess?" In it, the word hazard means "chance," as in "take a chance." Think of the hap in haphazard as short for "happen." Combine hap- and -hazard and you get something that happens (or appears to have happened) by chance. If you approach a math problem with haphazard reasoning, you're likely to get it wrong. All forms of 'haphazard' will appear on average once every 3177 pages. haphazard haphazardly haphazardness

Haphazard Hazard Hæp'hæzərd Adj 偶然的；随便的 Timetable Lessons Held