The Molecular Clouds associated with the H II Regions/Candidates between $l=207.7^\circ$ and $l=211.7^\circ$

Using the PMO-13.7 m millimeter telescope at Delingha in China, we have conducted a large-scale simultaneous survey of(12)CO,(CO)-C-13, and C(18)OJ = 1 - 0 emission toward the sky region centered atl = 2097,b = -225 with a coverage of 40 x 45. The majority of the emission in the region comes from the clouds with velocities lying in the range from -3 to 55 km s(-1), at kinematic distances from 0.5 to 7.0 kpc. The molecular clouds in the region are concentrated into three velocity ranges. The molecular clouds associated with the 10 Hiiregions/candidates are identified and their physical properties are presented. Massive stars are found within Sh2-280, Sh2-282, Sh2-283, and BFS54, and we suggest them to be the candidate excitation sources of the Hiiregions. The distributions of the excitation temperature and line width with the projected distance from the center of Hiiregion/candidate suggest that the majority of the 10 Hiiregions/candidates and their associated molecular gas are three-dimensional structures, rather than two-dimensional structures.