versus 四级六级考研雅思

Another critical factor when designing tricycle gear is to properly balance the load carried by the main gear versus the nosewheel.

起落架的另一个不利因素,设计时需要较精确的分配主轮与轮的负荷.

Comparison interventions included non-iodised salt, iodised water, iodised oil, iodation with potassium iodide versus potassium iodate.

作对照的干措施包括无碘食盐、碘化水、碘油，以及碘酸钾与碘化钾作对照。