详细解释:a. 在逐步废弃的
词型变化：
副词:obsolescently名词:obsolescence英语解释：
形容词 obsolescent:
becoming obsolete详细解释：
ob.so.les.cent
adj.（形容词）Being in the process of passing out of use or usefulness; becoming obsolete.逐渐废弃不用的：正处于废退或无用的过程；正成为废品的Biology Gradually disappearing; imperfectly or only slightly developed. Used of an organ or other part of an animal or a plant.【生物学】 退化的：逐渐消亡的；没有完全退化或进化程度微小的。用于指动物或植物的器官或其它部分
来源：Latin obsolôscôns obsolôscent- [present participle of] obsolôscere [to fall into disuse] 拉丁语 obsolôscôns obsolôscent- [] obsolôscere的现在分词 [成为废止不用的状态] ob- [away] * see ob- ob- [离开] *参见 ob-solôre [to be accustomed to] solôre [习惯于]
【引伸】
ob.soles.cence
n.（名词）ob.soles.cently
adv.（副词）