1. In the past decade, only three blue diamonds of 10 carats or more with the same vivid grading for intensity have been sold at auction, all weighing less than 12 carats and none flawless, he said.
2. n. 贡献，捐款(赠)
3. If you do much hiring of freelancers, you’ve probably considered outsourcing the outsourcing. There are several great services that can help, each with varying business models. For example, Bolton Remotewill build your team with vetted, offshore contractors. Another provider,Hubstaff, starts with your project in mind and then matches you with project specialists. Using an outsourcing placement service will save time instead of trying to do the recruiting yourself. These firms typically offer free recruiting and placement services but take a cut of the hourly rate.