be proficient at an art 精通一种技艺
be proficient at the Eclectis 精于杂学之人
becoming proficient at termite fishing 分词短语在句中充当主语
Boys test better in hand-eye coordination, making them more proficient at ball sports.
男孩在手眼协调测试中更出色,这使他们更精通球类运动。
他的工作效率很高。
And he was very proficient at measuring atomic mass.
他对测量原子质量很精通。
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