ladder什么意思

ladder什么意思 move up the economic ladder 什么意思 move up the ladder什么意思they can now afford to move up the ladder in terms of finding a place to live marker和ladder有什么区别 Most of our economic gains have gone to people at the very top of the income ladder.什么意思.have gone to people 什么意思 it is climbing up a ladder的意思 ladder是什么意思? This ladder is so heavy that I can not carry it.(保持原句意思)This ladder isn't _______ ________ for me to carry. The ladder might be lying on the ground instead of against a wall.的意思. “at the top of the ladder tree” 是“名列前茅”的意思吗 博凌科为凋亡DNA Ladder快速提取试剂盒（离心柱型）提取DNA Ladder片段过程中需要注意什么? 电泳时marker是如何选择的?100bp DNA ladder是指什么? 英语翻译请问 Walking under a ladder到底有什么深层含义?好像和迷信有关的. higher up the ladder educational ladder是什么意思 ladder climbing是什么意思 fetch a ladder是什么意思 climb the ladder是什么意思