Tuning can include adding extra indexes to yield a more efficient access plan, which makes tables volatile to encourage index usage and avoid table scans if possible.
调优包括添加额外索引来生成一个更高效的访问计划，让表格变幻无常，进而鼓励索引的使用，如果可能的话也可以避免表扫描。
The yield gap between conventional and index-linked Treasuries, a measure of inflation expectations, has risen by more than 0.3 percentage points this year.
作为通胀预期的指标，传统国库券和与物价指数挂钩的国库券之间的经济收益差额，今年已经上升超过了0.3%。
A field study was conducted to determine the relationships between Crop Water Stress Index (CWSI), yield, and quality of cotton under drip irrigation with mulch.
通过田间试验，研究了膜下滴灌棉花的作物产量、品质和作物缺水指标(CWSI)定量关系。
Aims Accurate simulation of green area index is critical for reliable prediction of crop growth and yield using a crop growth model.
准确模拟绿色面积指数是作物生长模拟模型可靠预测作物生长和产量的关键。
A set of reciprocal introgressive line populations was used to study phenotypic index, physiological index and yield characteristic of rice under normal and low-N conditions.
同时利用一套双向导入系群体，分别在正常和低氮条件下考察相应形态指标、生理指标和产量性状。
Trend of corn yield approximately agreed with the productivity index, and there was a positive relationship between them.
玉米产量与生产力指数变化趋势基本一致，为一正相关关系。
With greater capacity, we can get a higher grain yield and harvest index.
具有较大的库容，最终获得了较高的收获指数和籽粒产量。
For a given rice variety, the crop harvest index, which is calculated by the grain yield divided by total dry matter produced above ground, may vary with crop management practices used.
对于给定的水稻品种，作物收获指数(由籽粒产量除以地上部分总干物重求得)可能随作物管理措施不同而变化。
A quantitative drought index is necessary for soil water management and crop yield evaluation.
农田水分管理以及产量评估都需要对土壤作物受旱状况定量化和指标化。
For reinforced concrete structure construction with seismic fortification, the yield-strength ratio of steel bar is a very important material quality index.
对于有抗震设防的钢筋混凝土框架结构施工，钢筋屈强比值是个十分重要的材料质量指标。
And index futures is just a effective hedging tool, by hedging ETF with index futures to reach the goal of avoiding risk and locking yield.
股指期货恰恰是一种有效的套期保值工具，通过对etf进行套期保值操作可以达到规避风险和锁定收益的目的。
The average yield of every 3 ~ 4 a from a single twig and from an individual could also be employed as an index for early stage selection of new clones.
利用3 ~4年单枝结果数和单株产果量的平均值作为高产胶优良无性系早期选择的标准。
The grain-leaf area ratio was a quantitative expressing way to evaluate the coordinative level of source-sink relationship and was taken as a comprehensive index to select the variety of high yield.
粒叶比是衡量源库关系是否协调的一种数量化表示方法，被作为筛选高产品种的综合指标。
Stocks Index Futures is the major tool for the investors' hedging, by putting stock index futures on a fall, to reach the goal of avoiding risk and locking yield.
股指期货是投资者进行套期保值的主要工具，通过做空股指期货，可以达到规避系统性风险和锁定收益的目的。
Stocks Index Futures is the major tool for the investors' hedging, by putting stock index futures on a fall, to reach the goal of avoiding risk and locking yield.
股指期货是投资者进行套期保值的主要工具，通过做空股指期货，可以达到规避系统性风险和锁定收益的目的。
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