Answers

2016-02-14T23:15:24+08:00
The question means that these are traditions that have no scientific proof of the side effects. Example is when you played computers for 5 hours and you took a shower immediately, then you would be blined. Another is if you cut your nails during night time, you will experience bad luck. Hope this helps =)
0
2016-02-18T13:08:29+08:00
Those practices with no scientific bases are superstitions
1 5 1