Conundrums

All told, output and margin conundrums have pushed down return on capital employed to all-time lows.

总之，产出和利润率的双重困境，将已动用资本回报率（ROCE）推向历史新低。

Based on the analysis of the characteristics of conundrums, the semantic approach is introduced and the semantic strategies are summarized.

基于对英语脑筋急转弯特征的分析，本文提出了从语义学的角度对英语脑筋急转弯进行研究，并对其运用的语义策略进行了归纳总结。

The theory, if valid, would address important conundrums facing particle physicists.

这个理论如能被证实，或许就能解决粒子物理学家面临的重要难题。

More innovative approaches are required to tackle social conundrums and to clear paths for progress.

需要更具创新性的手段从而应对社会难题和为进步扫清道路。

I see conundrums, dilemmas , quandaries , impasses, gnarly thickets of fateful possibility with no obvious way out.

眼看问题经纬万端,进退两难 、 入困境, 死路一条, 盘根错节的命定可能性,但找不到明显的出路.

The situations in Saudi Arabia, Yemen and Bahrain pose another set of conundrums.

沙特、也门以及巴林的局势构成了另一组谜题。

Unfortunately sludge bulking is one of the conundrums of all the traditional and improved activated sludge processes for its poor sludge sedimentation ability.

但是，不论哪一种改进的活性污泥工艺，污泥膨胀现象一直是困扰人们的难题之一，它的突出问题是污泥沉降性能差。

What prompts the formation of conundrums?

是什么促使的脑筋急转弯的生成？

Conundrums constitute a form of humorous expressions in English.

英语脑筋急转弯体现了英语幽默语言的特点。