neck and neck (尤指选举中)并驾齐驱，难分高低

【例句】
They are now neck and neck, which means exchange rates are very important.
欧美如今并驾齐驱，这意味着汇率非常重要。

The two horses were neck and neck at the finish fine.
那两匹马并驾齐驱，同时跑到终点。