带头: to take the lead, to be the first, to set an example...
桔子: tangerine, also written...
氧: oxygen (chemistry)...
急: urgent, pressing, rapid, hurried, worried, to make (sb) anxious...
咬: bite; snap at; gnaw...
英雄: hero...
怀孕: pregnant, to have conceived, gestation, pregnancy...
简化: to simplify...
签: sign one's name, a note, a stick, sign one's name...
抡: to swing (one's arms, a heavy object), to wave (a sword, one's fists), to fling (money)...