Tears are signs of gladness as well as of grief.是什么意思？

Tears are signs of gladness as well as of grief.

眼泪标志着悲伤,同样也标志着快乐.

tears

n. 眼泪( tear的名词复数 )，破洞，裂口，裂缝；v. 撕( tear的第三人称单数 )，（使）分裂，撕碎，扯破；

例句
Why do apparently sane people go through all the blood, sweat, tears and heartache involved in getting a PhD?
为什么那些看起来神志正常的人会拼了命地要拿到一个博士学位？

are

vi. （用于第二人称单复数现在时，第一、三人称复数现在时）是；n. 公亩（等于100平方米）；

例句
We are scared to abandon ourselves to our feelings in case we seem weak or out of control.
我们不敢放纵自己的情感，以免显得太过软弱或缺乏自制。

signs

n. 手势( sign的名词复数 )，[医学]征，标记，招

例句
The fabric was showing signs of age...
这块衣料可以看出岁月留下的痕迹。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

gladness

n. 欢乐，喜悦，欢喜；

例句
Although I was glad to hear the sound, yet my gladness was not without admixture.
虽然我很高兴听到他的声音, 但这高兴中也夹杂着别的成分.

as

adv. 同样地，一样地，例如；prep. 作为，以…的身份，如

例句
As far as I can recall, Patti was a Smith.
我记得帕蒂是姓史密斯的。

well

adv. 好，很，好意地，高高兴兴地；adj. 健康的，井的，良好的，恰当的；int. （用于表示惊讶，疑虑，接受等）；n. 泉，源泉，水井；vi. （液体）涌出，流出，涌流，涌上；vt. 涌出，喷出；

例句
He was well acquainted with the literature of France, Germany and Holland...
他对于法国、德国和荷兰的文学了如指掌。

grief

n. 悲伤，悲痛，悲伤的事；

例句
His grief was etched into every line of his face...
他一脸悲伤。