1.close approximation of 近似
A Fibonacci spiral, which is a close approximation of a golden spiral.
斐波那契螺旋是黃金螺旋線的近似表達PzFPlW~t4|W。

2.hard copy 打印稿
They also said they would mail me the hard copy, so I'll let you know as soon as I get it.
他們還說過要再給我一份打印稿，我一收到就盡快通知你dE.lXh@yvVn4h。

3.raise one's concern about 表達某人對某事的擔(dān)憂
Huang raised his concern about some small illegal studios mainly because they may affect the larger industry in the long run.
黃提出了他對一些小型非法工作室的隱憂，主要是因為從長遠來看，這些工作室可能會影響到整個行業(yè)的發(fā)展Dvzs7_r-lglWiDWq7.。

4.the gravity of ……的嚴重性
He doesn't seem to understand the gravity of the situation.
他似乎沒有意識到形勢的嚴重性i7A=j^PaRnmsryLOg。