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。
What is needed in the case of noise is a study of large numbers of people living under noisy conditions,
对于噪音问题,需要对大量生活在噪音中的人进行研究,