1. abiding by 遵守
Abiding by the principle of the definition of conversation meaning is of benefit to improve listening comprehension.
遵循會話含義的基本概念、原則，有助于聽力理解的提高NXwBd4;CA4Fk,#YE@。

2. walk away from 退出
Analysts said the rally was a result of Google's statement that it might walk away from China's search engine market.
分析人士稱，谷歌考慮退出中國搜索引擎市場的消息刺激了百度股價上漲7@UW]FG,9uv~7,EDARHx。

3. in the run-up to 在……前夕
That suspicion tends to be strongest in the run-up to new year, when the nation shuts down for a week's vacation.
這種疑心往往在春節之前，全國各地都會放假一周時最為強烈;BQhzz=-i=2。

4. give sb. an edge 給某人帶來優勢；讓某人搶占到先機
Thorough preparation may give yourself an edge over your competitors.
全面的準備工作或許能讓你在競爭者面前搶占到先機PX_bj]jNm1。