- 1. ventilate; aerate
 - ♦ 粘土结构紧, 不容易~。 Clayey soils are dense and poorly aerated.
 - 2. be in touch (or communication) with each other; keep each other informed
 - ♦ 各单位要经常~。 The various work units must keep in touch with each other.
 - ♦ 这件事你得跟他通个气。 You should let him know of this matter.