The villi , crypts, goblet cells and endocrine cells were presen - ted during 9 th week.是什么意思？

The villi , crypts, goblet cells and endocrine cells were presen - ted during 9 th week.

十二指肠的绒毛、肠脲 、 杯状细胞和内分泌细胞于第9周胎出现.

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。

villi

--

例句
The lacteals of villi are part of the lymphatic system.
绒毛的乳糜管是淋巴系统的一部分.

crypts

n. 地窖，（尤指）教堂地下室( crypt的名词复数 )；

例句
Note the crypts that are lined by numerous goblet cells.
表明腺管由很多杯状细胞排列.

goblet

n. 高脚酒杯；

例句
Pseudostratified ciliated columnar epithelium with pale goblet cells.
假复层纤毛柱状上皮中的杯状细胞.

cells

n. <生>细胞( cell的名词复数 )，小牢房，（修道士或修女住的）小房间，电池；

例句
An increasing body of evidence suggests that all of us have cancer cells in our bodies at times during our lives.
越来越多的证据表明，我们所有人一生中体内时有癌细胞存在。

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。

endocrine

adj. 内分泌（腺）的，激素的；

例句
...the hormones secreted by our endocrine glands.
人体内分泌腺分泌的荷尔蒙

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。

Ted

vt. 翻晒；

例句
As an experiment, we bought Ted a watch.
我们试着给特德买了一块手表。

during

prep. 在…的时候，在…期间，当…之时，其间；

例句
...the accrual of funds used during construction.
建设过程中资金的累积

Th

--

例句
Who's at 5 th and Alameda? | - Don't let that fucker out of your sight!
阿拉米达街5号? | - 别让那混蛋离开你的视线!

week

n. 一星期，周，工作周（一个星期中的工作时间）；

例句
The subject of the talk is announced a week in advance.
会谈的主题已提前一周宣布。