鸭子在泥泞的池塘里笨拙地挣扎。

The duck ___floundered clumsily in the muddy pond.

他在数学考试中完全不知所措，连最简单的题目都答不上来。

He completely ___floundered during the math test, unable to solve even the simplest problems.

渔民今天捕获了几条比目鱼。

The fishermen caught several ___flounder today.