1. He gave an ostentatious yawn.
他张扬地打了个哈欠。
2. She makes no attempt to stifle a yawn.
她并未试图忍住一个哈欠。
3. He faked a yawn.
他装着打了一个呵欠。
First, by using Chinese investment and technical expertise in the nascent manufacturing sector, export volumes can be improved, ultimately bridging the yawning trade deficit.