1.He knew with so many people living here that it would be a rare occurrence. He decided to take full advantage of this.
有太多的人住在这，这种机会很难得，他打算充分的利用一下。
2.Dreams like this aren't a rare occurrence - my dreams are regularly vivid, colourful and panic-inducing.
这样的梦并不是偶然——我的梦境通常都很逼真、色彩鲜明，而且让人难受。
3.PMLE may be a rare occurrence in the inpidual concerned or may occur every time the skin is exposed to sunlight.
pmle可能是一个罕见的发生在个别或可能发生的每一次皮肤暴露在日光下。
4.In light of the rare occurrence of such residual teeth, this may represent over treatment.
鉴于很少出现这种剩余的牙齿，这可能是过度。
5.Gastrointestinal bleeding caused by an inverted Meckel's perticulum is considered a rare occurrence.
反转梅克尔氏憩室症造成肠胃道出血的病例在临床上是罕见的。
6.If the number of iterations is known and fixed -- a rare occurrence -- that number appears in square brackets following the asterisk.
如果迭代的次数已知并且固定--这种情况非常少见--这个数字出现在星号后面的方括号中。
7.But, as you noted, the opportunity to win a title is a rare occurrence.
但是，像你说的那样，夺冠机会很少发生。
8.Clear cell sarcoma (malignant melanoma) originating in bone is an extremely rare occurrence, which has been reported twice previously.
透明细胞肉瘤（恶性黑色素瘤）原产于骨是一种极为罕见，这是以前的两倍报告。
9.Under their vigilance, the prisons are relatively safe and secure, and serious physical violence is a rare occurrence.
他们夙夜匪懈，使监狱相较其他地区来得安全而保安严密，罕有严重暴力事件发生。
10.I do give gift art as well, but that's a very rare occurrence that's generally limited to personal friends.
我是会送礼的﹐不过那是限于个人朋友而且不常发生。