Stumbling blocks but stepping

Stumbling blocks but stepping what are the stumbling blocks in intercultural communication 求问：这句话中of him stumbling..这是什么用法啊?求具体介绍!But,would his parents approve of him stumbling through this symbolic day? keeps stumbling 什么意思He keeps stumbling on his feet, but the walk doesn't feel all that long.翻译这句? 英语翻译He keeps stumbling on his feet,but the walk doesn't feel all that long.这句不知该怎么译成中文 stumbling on happyness怎么翻译? blocks是什么意思? Ruling Blocks Trading blocks是什么意思?RT...不明白什么意思!差字典无解!原句：Trading blocks often espouse free trade between members but operate protective policies against third party states, i.e. the EU or NAFTA. blocks of 啥意思 in blocks of time the building blocks Blocks!是什么意思?谢谢 building blocks是什么意思 brand building blocks 英语翻译purple blocks breeze-blocks是什么意思 什么意思blocks