Subject + 坠入 + Object
坠入 (zhuìrù) means "to fall into" or "to plunge into." It describes dropping or sinking into something, and is often used both literally and figuratively, as in the expression 坠入爱河 (to fall in love).
那架小飞机失控后坠入了大海。
Nà jià xiǎo fēijī shīkòng hòu zhuìrù le dàhǎi.
The small plane lost control and plunged into the ocean.
他们在巴黎旅行时坠入了爱河。
Tāmen zài Bālí lǚxíng shí zhuìrù le àihé.
They fell in love while traveling in Paris.
一颗流星坠入了地球的大气层。
Yī kē liúxīng zhuìrù le dìqiú de dàqìcéng.
A meteor plunged into Earth's atmosphere.