Welche Bedeutung steckt hinter der hier vorgestellten Vokabel aus dem Bereich Meetings?

Kevin: 'How's our team doing with the design for the new art gallery?' Luis: 'I'm afraid we're trailing behind a little. I believe our only other major competitor is almost ready to submit their proposal.'

to trail behind

Do you know what it means?

• to be delayed
• to be very thorough
• to have great difficulties