The buyer has the right to cancel the contract unilaterally if the seller fails to ship the goods within the L/C validity.
如果卖方不能在信用证有效期内交货的话,买方有权单方面取消合同。
This is a major achievement because, in relative terms, planets are very small and old not emit light.
这是一个重要的成就,因为相对来说,行星很小,而且也不发光。