1. His defeatism prevented him from even trying to achieve his goals.
他的悲观主义使他甚至不愿尝试去实现自己的目标。
2. It's important to stay motivated and avoid falling into defeatism during challenging times.
在面临挑战的时候，保持积极的动力和避免滑入悲观主义是很重要的。