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the first trimester of pregnancy是什么意思？

the first trimester of pregnancy

妊娠的头三个月

相关词汇
the first trimester of pregnancy

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。

first

n. 第一，最初，头等，一号，，[乐]高音部；adv. 最早，最初，首次，宁愿，优先；adj. 第一流的，最初的，最早的，基本的，概要的，高音的；num. 第一；
例句
He abbreviated his first name to Alec.
他将自己的名字缩写为亚历克。

trimester

n. 三个月，学期；
例句
the first trimester of pregnancy
妊娠的头三个月

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。

pregnancy

n. 怀孕，妊娠，丰富，多产，意义深长；
例句
Again the pregnancy was very similar to my previous two...
同样，这次怀孕和我前两次的情形非常相似。
热门例句
He acknowledged publicly that he might have made a mistake.
他当众承认自己可能犯了个错误。
...the spiralling vortex airflow that slows the plane.
使飞机减速的螺旋形气流涡旋
You just go on ahead. I'll come by later...
你只管先往前走。我随后就来。
He who spares his rod hates his son, But he who loves him chastens him early.
24不忍用杖打儿子的,是恨恶他;疼爱儿子的, 趁早管教.
For further information, please contact 414 3925, extension 2253.
详情请致电414 3925,转分机2253。
He sat there while I made the case for his dismissal...
他坐在那儿，听我陈述解雇他的理由。
Baroness Thatcher's claims seem credible to many.
撒切尔女男爵的主张在很多人看来是可信的。
Nothing to be got without pains but poverty.
一份耕耘，一份收获。
This decree obliges unions to delay strikes.
该法令迫使工会推迟罢工。
The right to demand payment from the endorser of a commercial paper when the first party liable fails to pay.
追索权当有支付义务的第一方不能支付时，可以向商业票据的背书人要求支付的权力。
相关例句
Pablo and Prieto had about an equal faith in the ultimate victory.
巴勃罗和普列托对最后胜利的信心大致上差不离.
He shut himself in his office, telling his secretary to hold all calls.
他把自己关在办公室里，并告诉秘书所有的电话都不要转给他。
The walls need freshening up with white paint.
墙壁需要用白漆刷新。
a child's buggy fitted with a sunshade
装有阳伞的婴儿车
The car went out of control and veered across the road.
汽车失去了控制, 突然转向冲向大路的对面。
He talked to the press in a moment of indiscretion.
他一时冲动对新闻界发表了讲话。
Don't stick too precisely to what it says in the book.
不要过分拘泥于书上所说的。
He is always benevolent towards his countryman.
他对同胞总是善悲为怀。
He is a naval officer.
他是一名海军军官。
Are the lines perpendicular to each other?
这些直线相互垂直吗？