Very limited information has been reported concerning andesite weathering.是什么意思？

Very limited information has been reported concerning andesite weathering.

迄今对安山岩之风化过程研究资料之报导仍有限.

very

adj. 很，非常，恰好是，正是，十足的，特有的；adv. 很，非常，充分，完全；

例句
Most people have very little difficulty in seeing why a Van Gogh is a work of genius.
多数人不难理解为什么凡·高的作品是天才之作。

limited

adj. 有限的，（君主权力）受宪法限制的，〈美〉乘客名额有限制的，（智力，能力等）有限的；n. 高级快车，直达的火车或汽车；

例句
Tickets are limited and will be allocated to those who apply first...
票数有限，先申请者先得。

information

n. 信息，数据，通知，消息，知识；

例句
Too often he only absorbs half the information in the manual...
他对于说明书上所说的经常是一知半解。

has

v. 有( have的第三人称单数 )，（亲属关系中）接受，拿，买到；

例句
...the operation a patient has had.
病人做过的手术

been

v. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质（ be的过去分词 ），在，存在，不受干扰，去过了，be的过去分词；

例句
Have you been able to have any kind of contact?...
你联系上了吗？

reported

adj. 据报告的，据报导的，据传闻的；

例句
A Dr Matthew Owens was reported missing while on an expedition to north-eastern Turkey.
据报道，一位叫马修·欧文斯的博士在前往土耳其东北部考察的途中失踪了。

concerning

prep. （表示论及）关于，就…而论；v. “concern”的现在分词，涉及，关心，顾虑，忧虑；

例句
...assumptions concerning social causation.
有关社会因果律的假设

andesite

n. 安山岩；

例句
Very limited information has been reported concerning andesite weathering.
迄今对安山岩之风化过程研究资料之报导仍有限.

weathering

n. 侵蚀，风化，雨蚀；

例句
The soil is depleted first by having crops grown in it and second by natural weathering and bacterial action.
土壤首先是被种植其中的作物消耗掉，其次受自然风化和细菌活动的侵蚀。