在英语中，用英语表示写半小时的意思是 "write for half an hour"。这个短语的来源是英语中的时间表达方式，"half" 指半个，"an hour" 指一小时。
下面是一些用 "write for half an hour" 这个短语的英文例句及其中文翻译：
I need to write for half an hour before I can take a break. (我需要写半小时后才能休息。)
She wrote for half an hour every day to improve her writing skills. (她每天写半小时来提高她的写作技巧。)
He set aside time to write for half an hour every morning. (他每天早上抽出时间写半小时。)
下面是一些用 "write for half an hour" 这个短语的英文例句及其中文翻译：
I need to write for half an hour before I can take a break. (我需要写半小时后才能休息。)
She wrote for half an hour every day to improve her writing skills. (她每天写半小时来提高她的写作技巧。)
He set aside time to write for half an hour every morning. (他每天早上抽出时间写半小时。)