Synthesis and application of 4 - chloracetyl acetidin were introduced.是什么意思？

Synthesis and application of 4 - chloracetyl acetidin were introduced.

介绍 4- 氯乙酰乙酸乙酯的合成及应用.

synthesis

n. 综合，<化>合成，综合体，综合推理；

例句
His novels are a rich synthesis of Balkan history and mythology...
他的小说融合了大量巴尔干半岛的历史和神话故事。

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。

application

n. 适用，应用，运用，申请，请求，申请表格，勤勉，用功，敷用，敷用药；

例句
His application for membership of the organisation was rejected...
他想要加入该组织的申请遭到了拒绝。

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。

chloracetyl

氯乙酰基；

例句
Synthesis and application of 4 - chloracetyl acetidin were introduced.
介绍 4- 氯乙酰乙酸乙酯的合成及应用.

acetidin

乙酸乙酯；

例句
Synthesis and application of 4 - chloracetyl acetidin were introduced.
介绍 4- 氯乙酰乙酸乙酯的合成及应用.

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。

introduced

adj. [医]引种的，引进的；v. 提出( introduce的过去式和过去分词 )，介绍，引进，作为…的开头；

例句
The changes will be introduced in April...
这些变更将于4月开始实行。