中国对这片富含石油和天然气的水域的主权要求变得越来越自信，从而导致了过去的一个月不断上升地紧张形势。
Tension has risen in the region in the past month on concern that China is becoming more assertive in its claim to waters believed to be rich in oil and gas.
一步一步地，他从做一个重要的任务上升到做另一个重要的任务，直到他成为当时最好的士兵之一。
Step by step, he rose from one important task to another, until he became one of the best soldiers of that time.
美国的教育工作者并没有忘记这个事实，他们在数学不及格率上升的情况下，正在讨论如何让数学更好地满足学生的实际需要。
It's a fact not lost on American educators, who amid rising math failure rates are debating how math can better meet the real-life needs of students.
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