商务英语口语对话:环境条例

Hold sth/sb back: to prevent the progress or development of somebody/something 妨碍进展
Do you think that mixed ability classes hold back the better students? 你认为把不同能力的学生混合在一起的班级会妨碍较高水平学生的进步吗?

Vanish: to disappear suddenly and/or in a way that you cannot explain (莫名其妙地)突然消失
The magician vanished in a puff of smoke. 魔术师在一股烟雾中突然不见了.
My glasses seem to have vanished. 我的眼镜似乎不翼而飞了.
He seems to have vanished without trace. 他似乎消失得无影无踪.

Snag: a problem or difficulty, especially one that is small, hidden or unexpected (尤指潜在的、意外的、不严重的)问题,困难,障碍,麻烦
There is just one small snag─where is the money coming from? 只有一个小问题 钱从哪儿来?
Let me know if you run into any snags. 要是遇到什么麻烦,就告诉我.

Indigenous: belonging to a particular place rather than coming to it from somewhere else 本地的;当地的;土生土长的
the indigenous peoples/languages of the area 该地区的本地人╱语言
The kangaroo is indigenous to Australia. 袋鼠原产于澳大利亚.

来源:和谐英语-口语频道