I can't quite catch the drift of his speech.

我不甚了解他的演讲的大意。

youdao

B. Extensive reading: We must train our ability to scan, skip and read fast. Namely, the ability to catch the key words, the topic sentences and the drift of the articles.

泛读：要培养浏览，跳读和快读的能力。即抓住关键词，主题句和中心大意的能力。

youdao

And unfortunately, they make up a large portion of the California by-catch — up to 26 percent of the drift net.

很不幸，在加州漂网的副渔获物中，翻车鱼占到了26%。

youdao