Mobile technology means we can hold the world in our hands. However, when it comes to technology and health care, opportunities and challenges come together.
移动技术意味着我们可以把世界掌握在自己手中，然而，当涉及到技术和医疗保健，机遇和挑战同时出现。
2
Rubbing his hands together happily, he mumbled half to himself, "This piece of wood has come in the nick of time."
他高兴地搓着双手，轻声地自言自语地说：“这块木头来得正是时候。”
3
In some cultures we greet people by shaking hands or with another gesture to show that we are not carrying weapons—that we come in peace.