neck and neck
US /ˌnek ən ˈnek/
UK /ˌnek ən ˈnek/

1.
齐头并进, 不分上下
very close in a race or competition
:
•
The two runners were neck and neck as they approached the finish line.
两名选手在接近终点线时齐头并进。
•
The election results were neck and neck until the very end.
选举结果直到最后都不分上下。