a bumper crop meaning in Chinese

特大的丰收

The benign weather brought north america a bumper crop
温和的气候给北美带来大丰收。
The farming was done intensively for no other reason than a bumper crop
正是为了丰收的缘故，耕作才作得十分精细。
Despite a bumper crop last year , corn prices have risen by nearly 30 percent over the past nine months on the dalian commodities exchange
尽管去年玉米丰收，大连商品交易所的玉米价格在过去9个月里上涨了近30 % 。
Although last winter brought a bumper crop of sap for maple syrup , he wonders how long it will be before his farm ' s output begins to dwindle
虽然去年冬天他的槭树汁液（用作制造槭糖的原料）还是获得了丰收，可是他还想知道这样下去再过多久他的槭树汁液就会开始减产。