1·The irony of the historian' s craft is that its practitioners always know that their efforts are but contributions to an unending process.
历史学家工艺的讽刺之处在于，它的实践者总是知道，他们的努力只是对一个永无止境的过程的贡献。
2·Some practitioners also perform phlebectomy.
一些实践者还进行静脉切除术。
3·In instances in which "the model is the code," all practitioners have to do is make sure they have accurately specified models.
在那些“模型是代码”所在的实例中，所有实践者不得不做的是确保他们拥有精确给定的模型。
4·These studies were published in scientific and professional journals, and were adopted by practitioners in several organizations as applied tools for safety management.
这些研究报告发表在科学和专业杂志上，并被几个组织中的实践者作为安全管理应用工具采用。
5·Members of a Community of Practice are practitioners.
一个实践社区的会员就是实践者。