回答下列各题：
Looking back on my childhood，I am convinced thatnaturalists are born and not made．Al-though we werebwught up in the same way，my bwthers and sisters soonabandoned theirpressed flowers and insects．Unlike them，I had no ear for music and languages．I wasnot anearly reader and I could not do mental arithmetic．
Before World War I we spent our summerholidays in Hungary．I have only the dim memry 0f tlle house we lived in，of my room and my toys．Nor do I recallclearly the large family ofgrandparents，aunts，uncles and cousins who gathered next door．ButI do have a crystalclearmemory of the dogs，the farmanimals，the local birds，andabove all，the insects．
I am a naturalist，not a scientist．I have a strong love of the natural world and my enthusiasmhad ledme into varied investigations．I love discussing myfavorite topics and enjoy burning themidnight oil while reading about otherpeople’s observations and discoveries．Then somethinghap-pens that brings these observations together in my conscious mind．Suddenly you fancy you flee theanswer to the riddie，because it all seems to fit together．Thishas resulted in my publishing 300 -pets，and books，which some might honour with the title of scientific research．
But curiosity，a keen eye，a goodmemory and enjoyment of the animal and plant world donot make a scientist：one the outstanding and essential qualities required isself-discipline，aquality I lack．A scientist requires not only self-discipline but hard training，determination anda goal．A scientist，up to a point，can be made．A naturalist is born．If you can combinethetwo，you get the best of both wodds．
The author can’t remember his relativesclearly because_________．
我
