They used to see themselves as vouching for their product, as acting as a "gatekeeper to the capital markets" and providing a valuable social role. 过去,他们认为自己要为产品担保,作为“资本市场的看门人”,扮演有价值的社会角色。
They can buy in bulk through Alibaba, which acts as a trusted third party, vouching for the transaction. 他们可以通过阿里巴巴进行批量购买所需产品,阿里巴巴则作为受信任的第三方对交易的顺利完成提供保障。
Therefore, the only skills worth formally vouching for are those that require substantial effort to learn. 因此值得做正规证明的技能,是那些需要花费大量精力去学习才能获得的技能。
These are references vouching for his ability. 这些都是证明他能力的介绍信。