很少发生用英语怎么说？

很少发生

例句

• The severity of mottling increases as eggs become stale. Discoloured yolks are rare. 后期随色斑蛋的变质, 蛋黄颜色会逐渐变灰,但是褪色的情况很少发生.
• Between the group and the group very little occurs slaughters. 群与群之间很少发生厮杀.
• Little internalization of various amino acid transport sites occurs. 各种氨基酸输送位点很少发生内在化.
• ...a place which has rarely suffered a famine in its recorded history. 在历史记载中很少发生饥荒的地方