Puberty is the stretch of years when a child’s body changes into an adult’s body, and the person becomes able to have children. It is not one morning.

Puberty ispuberty指的是 the stretch of years一段歲月， when a child's body changes into an adult's body在這段時間裡孩子的身體會變成大人的身體， and the person becomes able to have children這個人也變得能夠生小孩。 It is not one morning這不是一個早上就發生的事。

Hair grows in new places. A voice may get lower. Girls start their periods. Bodies shoot up, often unevenly, and feelings can swing hard because of the body’s chemical messengers.

Hair grows in new places毛髮會長在新的地方。 A voice may get lower聲音可能會變低。 Girls start their periods女生會開始有月經。 Bodies shoot up身體會抽高， often unevenly常常長得不平均， and feelings can swing hard而且情緒也可能大幅起伏， because of the body's chemical messengers這是因為體內的化學傳訊物質。

Doctors, parents, and health class use this word; it is calm and slightly medical, not rude.

Doctors, parents, and health class use this word醫生、父母和健康教育課會用這個字； it is calm and slightly medical它聽起來平和、有點醫學味， not rude不會顯得粗俗。

Though actually, puberty is about the body, not the school year. Someone can be twelve and already in it, or sixteen and still waiting — both are normal, and it is not a race.

Though actually不過其實 puberty is about the bodypuberty講的是身體， not the school year不是講幾年級。 Someone can be twelve and already in it有人十二歲就已經進入了， or sixteen and still waiting也有人十六歲還在等—— both are normal兩種都正常， and it is not a race這不是一場比賽。

After puberty you are physically an adult; you may still be a teenager in every other way.

After pubertypuberty結束之後， you are physically an adult你身體上就是個大人了； you may still be a teenager in every other way但在其他方面，你可能還是個青少年。

Friends might not say the word at all. They name the bits: spots, a deeper voice, “when I was changing.”

Friends might not say the word at all朋友之間可能根本不會說出這個字。 They name the bits他們會直接講那些細節： spots長痘痘、 a deeper voice聲音變低、 "when I was changing."『我在變的時候』。