METHODS: The pollen allergens were purified by gelatin filtration.是什么意思？

METHODS: The pollen allergens were purified by gelatin filtration.

方法: 采取凝胶过滤方法分别提纯上述花粉变应原.

methods

n. method的复数：方法，方法( method的名词复数 )，方法论，教学法，分类法；

例句
The old methods weren't adequate to meet current needs...
老一套方法已不足以满足当前的需要。

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

pollen

n. 花粉，[虫]粉面；vt. 传授花粉给，用花粉掩盖；

例句
Flowers are designed to attract insects which then carry the pollen from plant to plant...
花的作用在于吸引昆虫，然后昆虫再将花粉传到其他植株上。

allergens

n. 变应原( allergen的名词复数 )；

例句
Objective : To explore the correlation of acarid mites allergens between working place and dwelling.
目的: 探讨特定职业人群工作场所与居室粉螨变应原的相关性.

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

purified

adj. 纯化的；v. 使纯净，使洁净( purify的过去式和过去分词 )；

例句
Only purified water is used.
只使用纯净水。

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

gelatin

n. 凝胶，白明胶；

例句
By freezing chitosan - gelatin complex induced phasic abruption, the porous and ventilative sponge of chitosan - gelatin was made.
通过冷冻壳聚糖 - 明胶共混液诱导相分离的方法,可以制成多孔性、亲水性 、 透气性良好的海绵状伤口敷料.

filtration

n. 过滤，筛选，滤清，滤除；

例句
This enzyme would make the filtration of beer easier.
这种酶会使啤酒更容易过滤。