Injections of vitamin C are obviously advantageous.是什么意思？

Injections of vitamin C are obviously advantageous.

注射维生素C显然是有利的.

injections

n. 注射( injection的名词复数 )，（液体）注入，喷入，大量资金的投入；

例句
Painful typhoid injections are a thing of the past, thanks to the introduction of an oral vaccine...
自从发明了口服疫苗后，令人痛苦的伤寒疫苗注射就成为了过去。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

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

vitamin

n. 维生素，维他命；na. “vitamine“的变体；

例句
Since iron destroys vitamin E, these two nutrients should not be taken in conjunction.
铁会破坏维生素E，所以这两种营养物质不应该同时摄取。

are

vi. （用于第二人称单复数现在时，第一、三人称复数现在时）是；n. 公亩（等于100平方米）；

例句
We are scared to abandon ourselves to our feelings in case we seem weak or out of control.
我们不敢放纵自己的情感，以免显得太过软弱或缺乏自制。

obviously

adv. 明显地；

例句
I thought he was very attractive and obviously very intelligent...
我觉得他魅力非凡，才智过人。

advantageous

adj. 有利的，优越；

例句
Free exchange of goods was advantageous to all.
商品自由交换惠泽八方。