at a gallop The pony went off at a gallop. 小马飞奔而去。

break into a gallop (=start to gallop) The horse broke into a gallop. 开始飞奔

an early-morning gallop along the beach 清晨在沙滩上的纵马飞奔

at a gallop Technology is moving at a gallop. 技术在飞速发展。