"アメリカでは常に家族が浮き沈みしている。"

Simplified Meaning:

In America, families often experience changes in their social and economic status. This means that sometimes a family might do very well, gaining wealth and success, while at other times, they might face difficulties and lose their wealth or status. For example, a family might build a successful business and become wealthy, but a few generations later, that business might fail, and the family could lose their wealth. This cycle of rising and falling happens because of many factors, like changes in the economy, personal choices, or unexpected events. People can apply this understanding to their lives by being prepared for changes and not taking their current situation for granted. It's important to work hard, make wise decisions, and save for tougher times, while also enjoying and appreciating the good times. Recognizing that ups and downs are part of life can help people stay resilient and hopeful, even when times are tough.