sign

记号；指示牌；迹象；象征；签名，签署；签约受雇

【例】 Leaders from different countries are expected to sign a treaty pledging to increase environmental protection.

人们期望各国领导人能签署一份条约，以承诺加强环境保护。

significantly

意味深长地；重大地；可观地

【例】 Our production has increased significantly over the past few years.

在过去几年中，我们的产量大幅提高了。

simplify

简化，使简单；使单纯

【例】 I strongly recommend relevant government departments to simplify executive procedures to improve efficiency.

我强烈建议有关政府部门简化行政程序来提高办事效率。

simulation

模拟，模仿；假装，伪装；模拟操作

【例】 The department conducts a crisis simulation every year to strengthen their abilities to cope with crisis.

这个部门每年都会进行一次危机模拟，以增强他们应对危机的能力。

simultaneously

同时地

【例】 This economic crisis did not first break out in one country and spread across other countries, but occurred in lots of countries simultaneously.

这场经济危机并不是先在一国爆发然后向其他国家蔓延，而是在多国同时出现。