to officially approve a trade deal or document
正式批准贸易协议或文件 (zhèngshì pīzhǔn màoyì xiéyì huò wénjiàn)
"Both leaders signed off on an agreement to strengthen bilateral trade."
"两位领导人签署了一份协议，以加强双边贸易。" (Liǎng wèi lǐngdǎo rén **qiānshǔle yī fèn xiéyì**, yǐ jiāqiáng shuāngbiān màoyì.)
to stay somewhere doing nothing while waiting for something
to gradually stop using or producing something
to mention or direct attention to something mentioned earlie...
to review or revise something carefully
to continue to be cheerful and positive despite difficulties
to use previous studies as a base for innovation
