1. His feelings fluctuated between excitement and fear.
   他的情绪在兴奋与恐惧之间变化不定。
2. The price of vegetables and fruits fluctuates according to the season.
   蔬菜和水果的价格随季节而波动。
3. Prices fluctuate from year to year.
   物价年年波动。
4. The price of vegetables fluctuates seasonally.
   蔬菜的价格随季节变动。
5. The enantioselectivity of N-dodecanoyl-L-proline-3,5-dimethyl-anilide is also good, but the basic line fluctuates strongly due to containing benzene ring in its molecular structure.
   虽然用N-十二酰基-L-脯氨酸-3,5-二甲基苯胺作添加剂，手性选择性也较好，但由于含有苯环，紫外吸收增强，基线波动严重。
6. The structure of the MIGmust be carefully selected, as the tiny change on it will affect beam performance highly, and beam current will fluctuate punily.
   同时，还发现由于阳极结构的变化导致阴极电场分布的变化，使电子注的注电流在各因子变化过程中出现了微小的扰动。
7. An analysis is made of the present status of production of DAP by the mixed process of preneutralization reactor tank-pipe reactor,as the moisture content of the product fluctuates greatly.
   针对预中和反应槽-管式反应器混合工艺生产磷酸二铵产品时,产品水含量波动较大的生产现状进行了分析。

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