n.通風(fēng)面具
Pneumatophore (aerophore; breathing root) A specialized negatively geotropic root produced by certain aquatic vascular plants(especially trees such as mangroves , e.g. 呼吸根：指由某種水生維管植物產(chǎn)生的特化的負(fù)向地性根（尤其如紅樹，如海桑屬），在土壤之上生長(zhǎng)良好。
aerophor 手提式呼吸器
