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| Chinese | English |
| 二嗪磷 | diazinon |
| 二氯苯醚菊酯 | permethrin |
| 1,2-二溴乙烷 | 1,2-ethylene dibromide |
| 二甲戊灵除草剂 | pendimethalin herbicide |
| 2,4-二甲氧苯乙酰 | 2,4-dichlorophenoxyacetic acid |
| 二甲硫吸磷 | thiometon |
| 二硫化碳 | carbon disulphide |
| 二苯胺 杀虫剂 | diphenylamine storage scald preventor; 030 |
| 十二烷胍 | dodine |
| 对二氯苯 | para-dichlorobenzene |
| 桔二叉蚜 Toxoptera aurantii | black orange aphid |
| 桔二叉蚜 Toxoptera aurantii | black citrus aphid |
| 桔二叉蚜 Toxoptera aurantii | camellia aphid |
| 桔二叉蚜 Toxoptera aurantii | aphid |
| 第二代 | F2 generation |
| 第二代 | second filial generation |
| 防御国家的二线 | second line of defence country |