Difficult surgery
高难度───High difficulty;手术───operation
laying of pipelines is a task with high difficulty and high risk.───管线铺设是一项高难度、高风险的海上作业。
of your voice is not wide enough, so you should not sing songs of high difficulty.───你的音域不够宽宏，还是别唱难度较大的歌了吧。
Multiple objective decision is a kind of complex decision problem with high difficulty in decision problems.───多目标决策是决策问题中一类复杂的、难度很大的决策问题。
A task with a high difficulty level is always an exciting opportunity for her and she has a way of making its achievement seem effortless.───即使是难度很大的任务，对于她来说也是个令人兴奋的机遇，好像不费力就能把工作完成好。
The cases of dismembered body are the major cases of great harm, severe social influence and high difficulty of detection.───碎尸案属于危害大、社会影响大、破案难度高的恶性案件。
Centrifugal hydrogen compressor has problems of high rotating speed, complex structure and high difficulty in vibration cause analysis.───离心式氢气压缩机转速高、结构复杂、振动原因分析难度高。