在中国农业专家和冈比亚农业部的大力支持下，达博成立了“公司+农户”模式的合作社，为周边2000多户农民提供了中国优质种子、化肥，并提供从耕地、插秧到收割、加工的全套机械化服务和农产品加工支持。
An animated sequence quantised using error-diffusion dithering. Note the jittering artifacts present in the background.
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1. 选择步长序列（如: n/2, n/4, ..., 1）