但另一方面，杂货商销售的易腐商品必须保持在冰冻或者低温的条件，而且只能在特定的几个时间点里投递。
Grocers, on the other hand, sell perishable products that have to be kept frozen or cool and that must also be delivered at specific times.
近期发生的严重低温雨雪冰冻灾害，给经济造成重大损失，给群众生活带来很大困难。
The recent disaster resulting from snow and ice storms caused significant losses to China's economy and made life very difficult for disaster victims.
持续大范围低温、雨雪和冰冻极端天气给电力、煤炭、成品油的生产和运输组织工作带来严重影响。
The Impact of disastrous weather of rain, snow and ice on supply of coal, power and oil and the transportation capacity.
方法经过灌流固定的CNS组织低温冰箱速冻后连续冰冻切片和改良的苏木精染色方法。
Methods After perfused fixation and quick freezing, the tissues of whole CNS were cut into serial sections with cryostat followed by hematoxylin stain.
为试材对不同温度梯度短时间冰冻低温处理对桃芽自然休眠解除的影响及生理生化机制进行了研究。
The effects of short-term freezing at different temperature on the endodormancy breaking of peach buds were studied.
水稻组织培养物超低温保存的效果常受到材料特性、冰冻保护剂、降温冰冻法、后处理及恢复培养等因素的影响。
Cryopreservation of tissue cultures of rice is usually influenced by some factors, such as material properties, cryoprotectant, freezing procedure, treatment after freezing and renewing culture.
这种现象有着重要的生态学意义。如果冰比水的密度大，那么暴露于低温之下的湖泊将会从底部开始向上发生冰冻现象。
This phenomenon has important ecological implications in that if ice were to be denser than water, then the lakes, exposed to low temperatures would start freezing from the bottom up.
这种现象有着重要的生态学意义。如果冰比水的密度大，那么暴露于低温之下的湖泊将会从底部开始向上发生冰冻现象。
This phenomenon has important ecological implications in that if ice were to be denser than water, then the lakes, exposed to low temperatures would start freezing from the bottom up.
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