About the Article of spare the spider Spiders are busy for at least half the year in killing insects. It is impossible to make more than the wildest guess at how many they kill, but they are hungry creatures, not content with only three meals a day. look at this sentence , i cant understand that ,how can i use this sentence "It is impossible to guess at how many they kill "displace this "It is impossible to make more than the wildest guess at how many they kill" ，what is the “make more than the wildest guess” mean?

its my first time to write my story here i find italki by chance，i have study english from my junior high。i can say out sentences esaily ,but i cant write frequly and corrctly ,now i study english again by using listening app and watching english moive . i have bought a new electrombile，it my first time to ride it on the road ,but its so crowded，and some one who is courier pass me away and carsh me down ,it hurt me very hearvy ,then ,he just stop there ,and look at me ,say"sorry ,it hurt you much ?" i say ,i am ok ,dont worry about me ,u can go .it truthly freak me out ,i dont want ride it more ,but its the time to go to the office ,then i try it again . i am very afriad of ride a bike in a crowded place ,and so many people in qinghe ,but i need wait a bus many time every day ,now its very cold in winter .so i bought a electrombile ,i told myself i can do it ,its a piece of cake ,its just need pratice. when i gone to the big road and saw there so many cars and people ,i am afriad and told myself to keep Keep your shirt on。 then i fall over oneself again on the railroad track of wu dao kou ,this railroad have closed some days ago, cos i ride so slow and the front wheel stuck in the hole of the railroad .it hurted me again .i wanna cry . finally i arrived my office and cant say any words ,but i need cheer up to celebraty my female boss's brithday ,she get us togher and take us to the ba yi lao ye which cook lamp very famous.i dont want to go ,i dont want eat lamp .i just want to stay . in the restaurant ，the waiter get us some noodles free when they konw one of us birthday today .they even get a boy and a girl singing a brithday song for us .one in chinese and one in english .i need to applause and sing this song. even thought its not a very good day ,the food is delicious ,by the way , i dont konw how i ride my electrombile back home ,specially its dark when i off duty . thankyou for your guys reading ,it must have many mistake of my story .now ,i need back my work . ps : i cant use it anymore ,how can i handle it ?