... 完整练习：full course 半个练习：half course 空枪练习：dry practice ...
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半个场地练习比赛 one-goal basketball
半个练习
Half an exercise
以上为机器翻译结果，长、整句建议使用 人工翻译 。
我花了半个小时练习弹钢琴。
It takes me half an hour to practice playing the piano.
youdao
‘我敢说你还没多次练习吧，’皇后说道，我在你这么大时，我总是每天为此花上半个小时，为什么？
‘I daresay you haven’t had much practice,’ said the Queen. ‘When I was your age, I always did it for half an hour a day.
她也像你那样练习半个小时的钢琴。
And she practises the piano for half an hour like you.
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