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F= Xi Ye+ XeYi F=XeYi-Xi Ye F= XiYi +XeYe F= Ye- Y i
were produced will produce have been produced will be produced
twelfth, last twelve,first twelfth, first twelve,last
from the 1st to the last day of the month from the 1st to the 15th of the month from the 1st to the 10th of the month from the 1st to the 5th of the month
other more the other another
from the 1st to the last day of the month from the 11th to the last day of the month from the 15th to the last day of the month from the 21st to the last day of the month
斜线终点坐标（Xe，Ye），当︱Ye︱>︱Xe︱时，计数方向取GY 斜线终点坐标（Xe，Ye），当︱Xe︱>︱Ye︱时，计数方向取GY 圆弧终点坐标（Xe，Ye），当︱Xe︱>︱Ye︱时，计数方向取GY 圆弧终点坐标（Xe，Ye），当︱Xe︱<︱Ye︱时，计数方向取GY
other the other another more
must have prepared couldn’t have prepared must prepare could prepare
two-month two-months two months two month
the next month last month the month before next month
Last year Since 2009 For last month For two weeks ago
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