分泌 [生物学] secrete; secretion; excretion 分泌胃液 secrete gastric juice
主动 1.(能够造成有利局面) initiative 主动作某事 do sth. on one's own initiative; do sth. of one's own accord; 争取主动 try to gain the initiative; contend for the initiative; 主动为人们做好事 be active in doing good to men; 主动求婚[爱尔兰] take the initiative in courtship; 她不愿意主动这么做。 she does not like to do so from her own initiative. 他工作很主动。 he displays great initiative in his work.2.[机械工程] driving; 主动报价 unsolicited offers; 主动导航 active homing; 主动舵 active rudder; main rudder; 主动滑轮 driving pulley; feed pulley; 主动皮带轮 drive pulley; 主动注意 [心] active attention
It may be a modified stoma with the guard cells permanently open so that water is lost passively by hydrostatic pressure , as in sea lavenders ( limonium ) , or a glandular hair from which water is actively secreted , as in runner bean ( phaseolus ) 这可能是由于气孔的保卫细胞永久张开而使水分在静水力的作用下被动排出,比如海薰衣草(补血草属) ;也可能是由腺毛主动分泌水分到外部,比如红花菜豆(菜豆数) 。