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今天我們要學的詞是watchful。Watchful, 的意思是注意的，警惕的。
比如，watchful eye是緊盯，密切關注的意思。 "A watchful eye is needed as purse thefts are on the rise," 偷包的越來越多，大家要多留神。 "The Brazilian government is keeping a watchful eye when it comes to the local currency market," 巴西政府密切注視著該國貨幣市場的風吹草動。再如： "We should be watchful of computer viruses," 我們要警惕電腦病毒。He's watchful of the times. 他密切留意時局。好，今天我們學習的詞是watchful...
