爪子: (animal's) claw...
专著: monograph, specialized text...
遗传: heredity, to inherit (a trait), to pass on (to one's offspring)...
粗糙: crude, gruff, rough, coarse...
像: (look) like, similar (to), appearance, to appear, to seem, image, portrait, resemble, seem...
体操: gymnastic, gymnastics...
时代: age, era, epoch, period (in one's life)...
漫游: to travel around, to roam, (mobile telephony) roaming...
扶: to support with the hand, to help sb up, to support oneself by holding onto something, to help...
