And it's because there's no one. It's all upbeat.

因为没有跟它一样都弱拍的曲子。

There would be two weak beats or two unstressed beats between each strong beat.

会有两个弱拍或者说拍存在于每个拍间。

Musicians clearly preferred versions with synchronized offbeats and these very slightly delayed downbeats.

音乐家们显然更喜欢同步弱拍和拍延迟常轻微的版本。

In another, there were very slight soloist delays on both downbeats and offbeats.

在另一个版本中，独奏者演奏拍和弱拍时有常轻微的延迟。

Swing rebels against a straight 50–50 meter with a prolonged first beat, or downbeat, and a shortened second beat, or offbeat.

摇摆乐反对连续而平衡的节拍，而采取延长的第一拍（拍），以及缩短的第二拍（弱拍）。