Well, many of them cost money to attend, at the very least cost trainees the income they forego while training. Plus, they tend to be short-term.

好吧，很多课程都是花钱参加的，至少学员在培训期间放弃的收入是要付出代价的。此外，这些课程往往都不是长期的。

The debate revolves around much else besides, not least the costs, risks and rewards of prolonging the war; and the place of Russia in the European order.

这场辩论还围绕着许多其他方面的问题，尤其是延长战争的成本、风险和回报；以及俄罗斯在欧洲秩序中的地位。

One should buy the policies that give the most protection at the least cost, insure the right family members and consider the family's financial needs.

一个人所购买的保单应该是以最低成本获得最多保护，为合适的家庭成员提供保障，并照顾到家庭的经济需求。

To the contrary, it's good that jurisdictions compete to provide public services at least cost to taxpayers, and to lure new investment and high-paying jobs.

相反地，各个司法管辖区竞争以最低成本向纳税人提供公共服务，并吸引新的投资和高薪工作，这是件好事。

When purchasing life insurance, there are many important factors to consider: one should buy the policies that give the most protection at the least cost, insure the right family members, and consider the family's financial needs.

购买的保单应当以最少的花费提供最大的保护，给合适的家庭成员投保，以及考虑家庭的理财需求。