难掌握的的例句（难掌握的在句子中的用法）

• a technique that was surprisingly difficult to master 意外地难掌握的技术
• It was a difficult concept to grasp, but Sam latched on very quickly. 那是个难掌握的概念，但萨姆很快就理解了。
• The elements of physics are difficult to grasp. 物理原理是很难掌握的。
• The vaulting horse is a difficult piece of apparatus to master. 鞍马是很难掌握的器械.