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- The intellectualizing of materials and structures is the most challenging subject in the 21th century. 材料与结构的智能化是21世纪具有挑战性的课题。
- As a new interdisciplinary idea with broader perspectives,it is quite a challenging subject of study. 它作为一个跨学科的具有广阔视域的新思潮，是颇具挑战性课题。
- As a result, the time-varying simulation for grassland is a challenging subject in computer graphics. 所以草地的时变模拟也是计算机图形学中一个具有挑战性的课题。
- For swarm-robot formation control, a useful and challengeable subject, stability is one of principal aims in its control system design. 组群机器人系统的队形控制是一个具有广阔应用前景和富有挑战性的研究方向，而稳定性，则是该类系统设计必须首先达到的目标。
- Are you going to take the challenge lying down? 你打算屈服于这种挑战吗？
- Never challenge a fool to do wrong. 不要怂恿愚人干错事。
- The bandits subject us to all sort of indignity. 强盗们对我们加以各种侮辱。
- I perceived his comment as a challenge. 我认为他的批评是对我的激励。
- Numerical prediction of ship hydrodynamic performance using computational fluid dynamics (CFD) technique at design stage is an important and challenging subject in the field of ship hydrodynamics. 采用计算流体动力学(CFD)技术实现在船舶设计阶段对船舶水动力性能的准确预报，是船舶水动力学学科中一个具有重大理论和实用意义的、富有挑战性的课题。
- Numerical prediction of ship hydrodynamic performance at design stage using computational fluid dynamics (CFD) technique is a most important and challenging subject in the field of ship hydrodynamics. 采用计算流体动力学（CFD）技术实现在船舶设计阶段对船舶水动力性能的精确预报，是船舶水动力学学科中一个具有重大理论和实用意义的、富有挑战性的课题。
- I felt a perverse desire to accept his challenge. 他向我挑战，我就偏要应战。
- Complex networks have penetrated into many fields such as mathematical subject, bionomics, engineering and so on.Now the research on complex networks has become a very challenging subject. 复杂网络研究正渗透到数理学科、生命学科和工程学科等众多不同的领域,对复杂网络的研究已成为网络时代科学研究的一个极其重要的挑战性课题。
- He received a challenge to a TV debate. 他接到电视辩论的挑战。
- He wants a career that offers a challenge. 他要有挑战性,能有一番作为的事业。
- He posed as an authority on that subject. 他以那个问题的权威自居。
- Open to doubt or challenge; problematic. 可疑的易于受到怀疑或挑战的; 有疑问的
- I have no pretence to be an expert on the subject. 我并不自命是这方面的专家。
- He's mute on the subject of social system. 他对社会制度的问题保持沉默。
- This is one of the standard books on the subject. 这是有关这个问题的权威著作之一。
- What did he do in reply to your challenge? 你提出与他较量，他作何反应?
