Rachis - removing could increase grain weight, while defoliation could lower grain weight.是什么意思？

Rachis - removing could increase grain weight, while defoliation could lower grain weight.

剪库增加粒重, 而剪源则降低粒重.

rachis

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例句
Spadix rachis flat, margin with bract - like appendages; flowers small, monoecious, in 2 series on rachis, apetalous.
肉穗花序轴扁平, 边缘有苞片状附属物; 花小, 单性,雌雄同株, 呈2列排列于花序轴上, 无花被.

removing

n. 消除，排除，除去；v. 开除( remove的现在分词 )，去除，脱去（衣服等），移走；

例句
Consumer advocacy groups are not so enthusiastic about removing restrictions on the telephone companies.
保护消费者团体并不热衷于取消对电话公司的限制。

could

aux. “can”的过去式，能够，打算，用于假设语气的条件句，用于虚拟语气的结论句；

例句
The regulations were relaxed and the prisoners could get out and about a bit.
规定有所放宽，犯人可以出去短暂放风。

increase

vt.& vi. 增加，增大，增多；vt. 增强，增进，[缝纫]放（针）；vi. 增强，增进，增殖，繁殖，[缝纫]放针；

例句
Companies need to take active steps to increase exports.
各公司需要采取积极措施增加出口。

grain

n. 谷物，粮食，（沙，金，盐等的）颗粒，谷粒，籽粒，（木材，大理石等的）纹理；vt. 把…作成细粒，把…漆[画]成木纹，染透，刮去（皮上的）毛；vi. 成谷粒；

例句
The six food groups include grain products, vegetables, fruits, milk and milk products, meats and meat alternates, and a miscellaneous group.
这6类食物包括谷类产品、蔬菜、水果、牛奶和奶制品、肉类和肉类替代品以及杂类食品。

weight

n. 重量，体重，重担，重任，重要，[统]权，加重值，权重；vt. 加重于，使变重，使负重，使负担或压迫，[统]使加权，附加加重值于；

例句
The ice was not thick enough to bear the weight of marching men.
冰不够厚，承载不了行军队伍的重量。

while

conj. 在…期间，与…同时，虽然，

例句
A Dr Matthew Owens was reported missing while on an expedition to north-eastern Turkey.
据报道，一位叫马修·欧文斯的博士在前往土耳其东北部考察的途中失踪了。

defoliation

n. 落叶，采叶，去叶；

例句
Rachis - removing could increase grain weight, while defoliation could lower grain weight.
剪库增加粒重, 而剪源则降低粒重.

lower

adj. 下方的，在底部的，较低级的；v. 降低，减少，缩小；

例句
...a speech in which he affirmed a commitment to lower taxes...
他作出减税承诺的演讲