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| Chinese | English |
| 冬青双色木虱 | ilex sucker (Trichochcrmes bicolor Kuwayama，木虱科) |
| 双刺盔唇瓢虫 | twicestabbed lady beetle (Chilocorus stigma (Say)，瓢虫科) |
| 双型垫刃线虫 | tylenchus biformis (Tylenchus biformis Cobb.，垫刃线虫科) |
| 双子苏铁 | dioon (Dioon sp.) |
| 双子苏铁 | chestnut dioon (Dioon edule sp.) |
| 双子苏铁属 | dioon (Dioon L.，苏铁科) |
| 双子苏铁属 | chestnut dioon (Dioon spp.，苏铁科) |
| 双孢盘星藻 | pediastrum duplex (Pediastrum duplex sp.，纲藻科) |
| 双宫垫刃线虫 | tylenchus dihystera (Tylenchus dihystera Cobb.，垫刃线虫科) |
| 双宫螺旋线虫 | helicotylenchus dithystera (Helicotylenchus dithystera Sher) |
| 双尾目 | order Diplura (Diplura) |
| 双尾目 | entotrophi (Entotrophi) |
| 双尾目 | campodeids (Diplura) |
| 双尾虫科 | campodeids (Campodeidae) |
| 双峰驼 | Bactrian camel (Camelus bactrianus) |
| 双带蚱蜢 | two-striped grasshopper (Melanoplus bivittatus (Say)，蝗科) |
| 双态现象 | dimorphism |
| 双扇蕨 | yaburegasa-urabosia (Dipteris conjugata Reinw.，双扇蕨科) |
| 双扇蕨 | dipteris (Dipteris sp.) |
| 双扇蕨属 | dipteris (Dipteris spp.，双扇蕨科) |
| 双扇蕨科 | yaburegasa-urabosia family (Dipteridaceae) |
| 双扇蕨科 | dipteris family (Dipteridaceae) |
| 双旋角花 | twist-arum (Helicodiceros muscivorus Engler) |
| 双旋角花属 | twist-arum (Helicodiceros Engler，天南星科) |
| 双星瓢虫 | two-spotted lady beetle (Adlia bipunctata (L.)，瓢虫科) |
| 双染色体组种 | digenomic species |
| 双球菌 | diplococcus (Diplococcus sp.) |
| 双盾木 | rosy dipelta (Dipelta floribunda Maxim.) |
| 双盾木属 | rosy dipelta (Dipelta Maxim.，忍冬科) |
| 双碟荠孪果荠，Biscutella laevigata sp. | biscutella |
| 双碟荠属 | biscutella (Biscutella spp.，十字花科) |
| 双稃草 | common diplachne (Diplachne fusca Beauv.，禾本科) |
| 双穗雀稗 | sour paspalum (Paspalum conjugalum Berg.，禾本科) |
| 双穗雀稗 | sour grass (Paspalum conjugalum Berg.，禾本科) |
| 双穗飘拂草 | two-spikelet fimbristylis (Fimbristylis tristachya var. subbispicata T. Koyama，莎草科) |
| 双穗麻黄 | joint-fir ephedra (Ephedra distachya L.，麻黄科) |
| 双穗麻黄 | sea grape (Ephedra distachya L.，麻黄科) |
| 双簇天牛 | oak longicorn beetle (Moechotypa diphysis Pascoe，天牛科) |
| 双纹叶蝉 | double-banded leafhopper (Erychroneura limbate Matsumura，叶蝉科) |
| 双线沫蝉 | two-lined spittlebug (Prosapia bicincta (Say)，沫蝉科) |
| 双翅目 | order Diptera (Diptera) |
| 双肛 吸虫 属 | Bianium (Bianium spp.) |
| 双脐螺属 | biomphalaria |
| 双色尺蛾 | bicolor geometrid (Plemyria bicolorata Hufnagel，尺蛾科) |
| 双花番红花 | Scotch crocus (Crocus biftorus Mill.，鸢尾科) |
| 双葵双锦葵，Sidalcea malviflora Gray. | checker bloom |
| 双葵属 | checker bloom (Sidalcea Gray.，锦葵科) |
| 双蛰刃线虫茎线虫，Ditylenchus sp. | ditylenchus |
| 双蛰刃线虫属茎线虫属，Ditylenchus Filipjer | ditylenchus |
| 双距花 | twin spur (Diascia barberae Hook. f.) |
| 双距花属 | twin spur (Diascia Link et Otto，玄参科) |
| 双颚齿蜈蚣科 | dignathodontids (Dignathodontidae) |
| 四双叶甲 | klamathweed beetle (Chrysolina quadrigemina Suffrian) |
| 奇线双交叉 | disparate chiasmata |
| 婆罗双树柳安木，桃花心木，Shorea robusta Gaertn | lauan |
| 婆罗双树属 | mangasinoro (Shorea L.，龙脑香科) |
| 婆罗双树属 | lauan (Shorea L.，龙脑香科) |
| 朝鲜双稃草 | diplachne (Diplachne serotina var. chinensis Chwi，禾本科) |
| 枝双腔吸虫 | lancet fluke (Dicrocoelium lanceatum) |
| 淡色双胞孢子类 | hyalodidymae (Hyalodidymae) |
| 芋双线天蛾 | striped back hawk moth (Theretra oldenlandiae Fabricius，天蛾科) |
| 蔷薇双色象虫 | rose curculio (Rhynchites bicolor F.，象甲科) |
| 非洲双翼豆 | African peltophorum (Peltophorum africanum，豆科) |
| 香蕉双带黑象 | banana weevil (Odoiporus sp.，象甲科) |