When the soil is deficient in some particular element and where there are no others to substitute, the plants will grow to maturity bearing only a fraction of that mineral.
当土壤缺乏某种特殊元素同时找不到替代物时，这些植物将生长成熟但是只有多少分之一的这种元素。
The experimental result shows that higher bladder pressure decreases thickness of composite bearing cylinder, increases fiber volume fraction and improves the bending properties.
试验结果表明，气囊充压压力使复合材料承力筒的壁厚减薄，纤维体积含量增加，弯曲性能提高；
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