今天我们要学的词是watchful。Watchful, 的意思是注意的，警惕的。比如，watchful eye是紧盯，密切关注的意思。 "A watchful eye is needed as purse thefts are on the rise," 偷包的越来越多，大家要多留神。 "The Brazilian government is keeping a watchful eye when it comes to the local currency market," 巴西政府密切注视着该国货币市场的风吹草动。再如： "We should be watchful of computer viruses," 我们要警惕电脑病毒。He's watchful of the times. 他密切留意时局。好，今天我们学习的词是watchful...