例27　There are already robot systems that can perform some kinds of brain and bone surgery with submillimeter accuracy far greater precision than highly skilled physicians can achieve with their hands alone.

【结构分析】此句子主干是There are already robot systems，后面加上定语从句that can perform some kinds of brain and bone surgery，后面加上介词短语with submillimeter accuracy，后面加上形容词短语far greater precision做定语，修饰前面的accuracy。

【亮点回放】此句话的亮点在于定语从句套上介词短语，套上形容词短语，这种连环的超级的定语，很经典，通过定语的连环修饰，增加了句子的观赏性。

【核心词汇】

robot systems　机器人系统

perform some kinds of brain and bone surgery　进行脑部和骨骼手术

submillimeter accuracy　精确到毫米以下

far greater precision　非常精确

highly skilled physicians　技术高超的医生

【参考译文】现在已有一些机器人系统能够进行精确到毫米以下的脑部和骨骼手术这要比技术高超的医生单单用手精确得多。