形容词
中文翻译：不熟练的
同义词：
['unskilled', 'untrained', 'inexperienced']
例句：
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1. He is not as proficient at playing the guitar as he used to be.
他不再像以前那样擅长弹吉他了。
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2. The new software is not as user-friendly as its predecessor.
这款新软件的用户界面不如它的前一代友好。
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3. She is not as quick as she used to be when it comes to typing.
打字时，她现在不如以前快了。