wax and wane of the moon 月亮盈亏变化
wax and wane in popularity 人气起伏变化
wax and wane over time 随时间起伏变化
wax and wane of emotions 情绪波动
wax and wane in strength 强度变化
1. Her interest in painting tends to wax and wane over time.
她对绘画的兴趣会随着时间起伏变化。
2. The moon waxes and wanes in a regular cycle.
月亮按规律盈亏变化。
3. Public support for the policy may wax and wane.
公众对该政策的支持可能会起伏不定。
4. His enthusiasm for the project waxed and waned during the year.
他对这个项目的热情在一年中时高时低。
A: My motivation to study seems to wax and wane these days.
A：我最近学习的动力似乎时强时弱。
B: That’s normal. Everyone’s energy waxes and wanes sometimes.
B：这很正常，每个人的精力都会有起伏。
1) 指像月亮一样周期性变化
2) 指情绪或状态时强时弱
3) 指趋势或支持度上下波动
4) 用于描述自然或抽象事物的循环变化
1. （指情绪、兴趣等）起伏变化，时强时弱
e.g.Their enthusiasm for the idea waxed and waned.
他们对这个想法的热情时高时低。
verb phrase
1. to increase and decrease in strength, intensity, or level in a regular or repeated way
Synonym: fluctuate, ebb and flow