在英语中，如果想表示一种乐观的态度，可以使用以下短语和表达方式：
"Stay positive"：保持积极的态度。
例句：
"I know things are tough right now, but try to stay positive. Everything will work out in the end."（我知道现在的情况很艰难，但是请尽量保持乐观。最终一切都会好起来的。）
"It's important to stay positive, especially during difficult times pke these."（保持乐观的态度很重要，尤其是在这样困难的时刻。）
"Keep a positive attitude"：保持积极的态度。
例句：
"I know you're going through a tough time, but try to keep a positive attitude. It will help you get through this."（我知道你正在经历困难时期，但是请尽量保持乐观的态度。这会帮助你度过难关。）
"It's easy to get down when things don't go your way, but try to keep a positive attitude. It will make a big difference."（当事情不顺心时很容易感到沮丧，但是请尽量保持乐观的态度。这会有很大的不同。）
"Stay optimistic"：保持乐观。
例句：
"Even though things are tough right now, try to stay optimistic. Things will get better."（即使现在的情况很艰难，也要尽量保持乐观。情况会变得更好的。）
"It's easy to get down when things don't go your way, but try to stay optimistic. It will help you get through this."（当事情不顺心时很容易感到沮丧，但是请尽量保持乐观。这会帮助你度过难关。）
"Be optimistic"：
"Stay positive"：保持积极的态度。
例句：
"I know things are tough right now, but try to stay positive. Everything will work out in the end."（我知道现在的情况很艰难，但是请尽量保持乐观。最终一切都会好起来的。）
"It's important to stay positive, especially during difficult times pke these."（保持乐观的态度很重要，尤其是在这样困难的时刻。）
"Keep a positive attitude"：保持积极的态度。
例句：
"I know you're going through a tough time, but try to keep a positive attitude. It will help you get through this."（我知道你正在经历困难时期，但是请尽量保持乐观的态度。这会帮助你度过难关。）
"It's easy to get down when things don't go your way, but try to keep a positive attitude. It will make a big difference."（当事情不顺心时很容易感到沮丧，但是请尽量保持乐观的态度。这会有很大的不同。）
"Stay optimistic"：保持乐观。
例句：
"Even though things are tough right now, try to stay optimistic. Things will get better."（即使现在的情况很艰难，也要尽量保持乐观。情况会变得更好的。）
"It's easy to get down when things don't go your way, but try to stay optimistic. It will help you get through this."（当事情不顺心时很容易感到沮丧，但是请尽量保持乐观。这会帮助你度过难关。）
"Be optimistic"：