proficient相关的词根或词缀是: facfactfectficfig facfic

Proficient means students have a solid understanding of the material .

熟练意味着学生对材料有扎实的理解。

If you are a proficient writer you can write a book or a play .

如果你是一个熟练的作家，写一本书或一出戏。

These vacillations reveal the danger of regulatory capture especially in an industry as proficient in lobbying as banking .

这些犹豫不决揭示出潜在的“监管被俘”的危险，尤其是在对游说颇为精通的银行业。

Become proficient , and then put your focus on helping those who are below you .

变得熟练，然后把注意力放在帮助不如你的人身上。

After two years of living and working in china , ms. berman is proficient in mandarin .

在中国工作和生活了两年之后，伯尔曼女士的普通话已经很熟练了。