我艰难地在狭长地带上种了半英亩的玉米，在这之间一块几乎平坦的地上种了三叶草。
I grow hardly a half acre of corn in narrow strips, with clover between the strips, on land that is almost level.
挖沟撩壕栽培能极显著地提高三叶木通单位面积内茎藤和果实产量；
The trenches for cultivation can remarkably enhances the unit area output for the stem and fruit of Akebia trifoliate.
在同一地区还发现了另外两块这些三叶虫化石。
Two others of these trilobite fossils have been found in the same area.
与此同时，罗恩正在精神恍惚地撕掉他帽子上的三叶草。
Ron, meanwhile, was absentmindedly shredding the shamrocks on his hat. Mr.
与此同时，罗恩正在精神恍惚地撕掉他帽子上的三叶草。
Ron, meanwhile, was absentmindedly shredding the shamrocks on his hat. Mr.
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