“大约 6 到 8 点睡”可以用“Sleep at approximately 6 to 8 o'clock”或者“Go to sleep around 6 to 8 o'clock”来表达。
“approximately”有“大约;近似地”的意思,“at approximately 6 to 8 o'clock”表示“在大约 6 到 8 点”。
“around”也有“大约;在......周围”的含义,“go to sleep around 6 to 8 o'clock”能准确传达“大约 6 到 8 点睡”的意思。
例如:I usually sleep at approximately 6 to 8 o'clock.(我通常大约在 6 到 8 点睡觉。) 或者 He goes to sleep around 6 to 8 o'clock every day.(他每天大约 6 到 8 点睡觉。) 这两种表述在日常交流和书面表达中都是比较常见和易懂的。