Life may always have regret, but the future is still good.
生活或许总有遗憾，但未来依旧美好。

service to 服务,贡献

similarity between ……的相似之处

skill at 技巧,熟练

solution to ……的解决办法

sorrow at/for/over 悲哀,悲痛

stress on 对……的强调

after all 毕竟,究竟

ahead of 在……之前

ahead of time 提前

all at once 突然,同时

all but 几乎;除了……都

all of a sudden 突然

all over 遍及

all over again 再一次,重新

all the time 一直,始终

all the same 仍然,照样的

every other 每隔一个的