这条公路在周末常排满了汽车。
Whether or not we can catch up on sleep—on the weekend, say—is a hotly debated topic among sleep researchers.我们是否能在周末补觉是睡眠研究者们激烈争论的话题。
Whether or not we can catch up on sleep on the weekend, say — is a hotly debated topic among sleep researchers.例如,我们是否能在周末补觉是睡眠研究者们争论的热点话题。