在 + 洛杉矶 + Verb Phrase
洛杉矶 (Luòshānjī) is the standard Chinese transliteration for the city of Los Angeles. It is used as a proper noun in all contexts where you would refer to the city, such as describing events, locations, or travel destinations.
我下个月要去洛杉矶出差。
Wǒ xià ge yuè yào qù Luòshānjī chūchāi.
I'm going to Los Angeles on a business trip next month.
洛杉矶的天气一年四季都很好。
Luòshānjī de tiānqì yī nián sìjì dōu hěn hǎo.
The weather in Los Angeles is great all year round.
她在洛杉矶住了五年了。
Tā zài Luòshānjī zhù le wǔ nián le.
She has lived in Los Angeles for five years.