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对某事物掌握得很紧用英语怎么说？

对某事物掌握得很紧

a tenacious hold on something

相关词汇
tenacious hold on something

tenacious

adj. 顽强的，黏着力强的，坚决的，（记忆力）持久的；
例句
She is very tenacious and will work hard and long to achieve objectives...
她是个锲而不舍的人，为了达到目标愿意长期苦干。

hold

vt. 拿住，握住，保留，保存，扣留，拘押，容纳，举
例句
I will hold myself aloof from wrong and corruption.
我会让自己远离错误和腐败。

on

prep. （表示方向）向，（表示对象）对，（表示位置）在…上，（表示时间）在…之时；adv. （放，穿，连接）上，向前，（继续）下去；adj. 活动着的情况，状态，使用着的，发生着的，计划中的；
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。

something

pron. 某物，某事，重要的事物[人]，有一定意义的事物；n. （表示不确切的描述或数量）大致，左右；adv. 非常，有点，大约；
例句
Rachel was going to do something about Jacob...
蕾切尔将对雅各布有所行动。
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
Could you hear the pat?
你能听到轻轻的拍击声吗?
She gave me her hand with mute thanks.
她向我伸手表示无言的谢意。
It's late.I think I'll turn in.
很晚了, 我想我要睡了。
He turned away and refused to listen.
他转过身去, 不愿再听了。
He was kept in detention by the police.
他被警察扣留了。
He is mad for fame.
他疯狂地追求名誉。
Most of the victims were shot in the back while trying to run away.
大多数受害者在设法逃跑时从背后被枪杀。
Your left cerebral hemisphere controls the right-hand side of your body.
你的左半脑控制身体的右半身。
The tea is weak.
这茶很淡。
Tom is my junior.
汤姆是我的晚辈。