Period
01
a span of time, often with a clear beginning and end
例子
We lived in the city for a short period.
This period of history was marked by great change.
02
the symbol (.) used to end a declarative sentence or mark an abbreviation
Dialect
American
American
例子
Do n't forget to put a period at the end of the sentence.
His initials were written as J.D., with a period after each letter.
03
课时, 上课时间
each part into which a day is divided at a school, university, etc.
例子
During the first period, the class focused on mathematics, tackling complex equations and problem-solving.
The teacher announced a surprise quiz during the third period, catching the students off guard.
04
a length of time defined by the repetition of a process or phenomenon
例子
The Earth 's rotation defines a 24-hour period.
The pendulum swings back and forth in a fixed period.
05
月经, 例假
the monthly process where the uterus sheds its lining, resulting in blood discharge
例子
She experienced irregular periods during her teenage years, which later became more predictable.
她在青少年时期经历了不规律的月经，后来变得更加可预测。
Many women use menstrual products to manage their period comfortably.
许多女性使用月经产品来舒适地管理她们的月经期。
06
a division of geological time during which a specific set of rock layers was formed
例子
The Jurassic period is famous for its dinosaurs.
Fossils from the Cambrian period reveal early life forms.
07
the conclusion or final point of something
例子
Their contract came to a period last year.
The project has reached its natural period.
08
节, 三分之一
one of the three equal divisions of play in hockey, each lasting typically 20 minutes
例子
They scored three goals in the first period of the game.
他们在比赛的第一节中进了三个球。
Scoring in the opening period set the tone for the rest of the game.
在开场阶段得分就为比赛的其余部分定下了基调。
09
周期, 间隔
a recurring interval or length associated with a mathematical function or pattern
例子
The period of a trigonometric function is the length of the interval over which the function repeats its values.
三角函数的周期是函数重复其值的间隔长度。
The period of a periodic function is the smallest positive value of p for which f(x+p)=f(x ) for all x.
周期函数的周期是使f(x+p)=f(x)对所有x成立的最小正数p。
period
01
就这样, 句号
used to emphasize that something is final, absolute, or non-negotiable
例子
I am not going to change my mind about this, period.
我不会改变主意，句号。
I told you I do n't want to discuss it anymore, period.
我告诉过你我不想再讨论这件事了，就这样。
period
01
时期的, 历史的
typical of or relating to a specific historical time, especially used for things like fashion, furniture, or films
DialectAmerican
American例子
They wore period costumes for the play.
他们为这出戏穿了时期服装。
The house is filled with period furniture.
房子里摆满了时期家具。
词汇树
periodic
periodicity
period
