It's five o'clock.现在五点钟。

The trouble began just after ten o'clock last night.昨晚刚过10点钟麻烦就开始了。

at six o'clock in the morning清晨六点钟

Instead of being at one o'clock on the club handle, the left thumb would be directly on top of the shaft, at twelve o'clock.左手拇指不要放在球杆柄的一点钟位置, 而应直接放在球杆顶部正上方位置。