<prompt> tafsiri zifuatazo kutoka kwa swahili hadi kiingereza.aina hii ya kipengele sio tu kuchanganya wasambazaji wa wavuti, lakini pia hufanya kuwavuta kwao kwa sababu wanahitaji kutambua toleo halisi la kutambaa, na maagizo haya mara nyingi hayana kwenye kanuni zao.  <response>: this kind of feature does not only confuse web crawlers, but it also makes crawling a little difficult for them because they need to figure out the exact version of crawling, and this instruction is usually not in their codes. 