英语的10 30怎么说

In English, the time "10:30" is usually expressed as "ten thirty" or "half past ten." For example, you might say, "I have a meeting at ten thirty in the morning."
Note that in English, it is common to use the phrases "a.m." (ante meridiem) and "p.m." (post meridiem) to distinguish between morning and afternoon/evening times. So, "10:30 a.m." would be expressed as "ten thirty in the morning," and "10:30 p.m." would be expressed as "ten thirty at night" or "ten thirty in the evening."