洋葱鳞茎表皮细胞内可见皮层微管，呈薄片状，原生质体染色阴性。
Cortical microtubules were observed in intraepidermal cells of onion bulb with a thin section and negative staining of protoplasts.
分别用四个强度和时间的恒定磁场对紫皮洋葱鳞茎进行处理。
Onion bulbs were treated with four magnetic intensities and four times.
当洋葱鳞茎顶部的叶子干枯、倒伏后，就可以把鳞茎从地里拔出。
The bulbs can be pulled from the ground once their tops have dried and fallen over.
研究结果发现洋葱鳞茎内部细胞的细胞质内存在极丰富而精细的肌动蛋白微丝束。
It was found that the cytoplasm of the protoplasts were rich in very dense and fine actin microfilament cables.
结果表明：不同磁场强度和处理时间对洋葱鳞茎的发芽率和生理生化影响是不同的。
The results showed that different magnetic intensities and treating times had different effects on germination percentage of onion bulbs and their physiological and biochemical indexing.
用超薄切片和原生质体负染的方法，在电镜下观察到洋葱鳞茎内表皮细胞周质微管的存在。
Cortical microtubules were observed in intraepidermal cells of onion bulb with thin section and negative staining of protoplasts.
而在温暖气候条件下，洋葱能够在数小时日照的情况下形成鳞茎。
In warmer climates, Onions can begin developing bulbs with fewer hours of daily sun.
16世纪时，这个词经由拉丁语传入英语中，它的词义范围由泛指大蒜等植物的鳞茎缩小到仅表示洋葱。
As the word came down to English in the 16th century through Latin it narrowed its meaning from including things like garlic to mostly referring to Onions.
在寒冷气候条件下，洋葱可能需要14- 15小时日照才能形成鳞茎。
In cooler climates, Onions may need fourteen to fifteen hours of daylight to start forming bulbs.
地膜覆盖后洋葱叶片、鳞茎和根系的大小、重量都比对照显著增加。
May to June. Also the size and weight of leaves, onion bulb and root system increased markedly compared with the control.
洋葱头这种植物的鳞茎，由紧密同心圆组成；有刺鼻的气味和味道。
The rounded, edible bulb of this plant, composed of fleshy, tight, concentric leaf bases having a pungent odor and taste.
洋葱的特征是：一种由许多叶办组成的可食用的鳞茎，其中富含糖份及一种具有刺激性气味的植物油。
The onion is characterized by an edible bulb composed of leaves rich in sugar and a pungent oil.
洋葱的特征是：一种由许多叶办组成的可食用的鳞茎，其中富含糖份及一种具有刺激性气味的植物油。
The onion is characterized by an edible bulb composed of leaves rich in sugar and a pungent oil.
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