优化林业种植结构, 逐步调减速生桉种植面积.用英语怎么说？

优化林业种植结构, 逐步调减速生桉种植面积.

Optimize the structure of forestry planting, and gradually deceleration Eucalyptus cultivation.

optimize

vt. 使最优化，使尽可能有效；

例句
Orthogonal test method was used to optimize reaction conditions and the yield of acenaphthylene reached 59.09 %.
采用正交试验法,在优化的条件下苊烯产率达59.09%.

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。

structure

n. 结构，构造，建筑物，体系；vt. 构成，排列，安排；

例句
Engineers found the structure had been corroded by moisture...
工程师们发现该建筑已经受潮腐蚀。

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。

forestry

n. 林学，林业，造林术，林地；

例句
After afforestation afforest amounts to mark, how does forestry develop further?
造林绿化达标之后, 林业如何进一步发展?

planting

n. 种植，栽培，装备；v. 种植( plant的现在分词 )，建立，移植（动物、植物），在（某处）栽种；

例句
The planting of winter and spring-flowering bulbs will supply colourful decoration at a time when most gardens are looking fairly desolate.
栽种冬春季节开花的鳞茎植物可以在大多数花园看上去还比较萧索的时候提供多彩的装点。

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

gradually

adv. 逐步地，渐渐地，按部就班地，日趋，冉冉；

例句
He has gradually acquiesced to the demands of the opposition...
他渐渐顺从了反对派的要求。

deceleration

n. 减速；

例句
Sudden deceleration may also result in shearing injury to the intima of the aorta.
突然减速也可能造成主动脉内膜的剪式裂伤.

eucalyptus

n. 桉树，桉属植物；

例句
Menthol was obtained from lemon eucalyptus oil via cyclization and catalytic hydrogenation.
以柠檬桉叶油为主要原料经环化、催化氢化二步反应得到薄荷醇.

cultivation

n. 教养，栽培，耕作，（关系的）培植；

例句
They knew nothing of cultivation and nothing of any sort of basketwork or woven cloth.
他们对耕种一窍不通,也不知道如何编篮或织布.