The black cloud presignified a violent storm.

Well, animals, too, can use optical illusions to woo a mate.

不过, 动物照样也会利用这种视觉上的假象来求偶.

The magician tricks the audience with skilful optical illusions , making things appear and disappear.

魔术师一会儿把东西变出来了,一会又变没了,用视幻觉来迷惑观众.

Ironically, enzymes in yeast micro-organisms helped produce it in the first place.

有意思的是, 酵母菌微生物体内的酶首先促进自身的生长.

As a physical and biochemical barrier to infection, epithelial surfaces prevent the entry of micro-organisms.

作为物理和生化障碍,感染, 上皮表面防止入境的微生物.

They act as at least a temporary block to DNA synthesis in micro-organisms.

它们在微生物中至少对DNA合成起暂时性阻止作用.

The study of micro-organisms is known as microbiology.

微生物的研究被称作微生物学.

Deep UV Light inside the machine sterilizes micro-organisms that pass through.

深频紫外线清理经过设备内的微生物.

The natural decomposition of organic matter by micro-organisms or fermentation of a class of fertilizer.

天然有机质经微生物分解或发酵而成的一类肥料.

Meropenem is a carbapenem antibacterial agent that has antimicrobial activity against gram-negative, gram-positive and anaerobic micro-organisms.

美罗培南是一种对格兰氏阴性 、 格兰 氏阳性和厌氧细菌有抗菌活性的抗菌药.

There are two possible contaminants: pathogenic micro-organisms and hazardous chemicals.

有两种可能的污染源: 致病的微生物,有毒的化学制品.

European exchanges can profit margins of per cent or more.

欧洲的交易所可以获得50%或更高的利润率.

They have always had to do with relatively small profit margins.

他们不得不经常设法应付利润较少的问题.

Rising raw-materials costs are squeezing profit margins for many companies.

原材料成本的上升也使很多公司的利润率下滑.

Limit the capacity of airlines will be able to maintain profit margins.

限制运力将能够保持航空公司的利润率.

Profit margins are tight and consumers fickle.

利润微薄,而且消费者是变化无常的.

The profit margins have been trending down ( upwards ).

利润率一直趋向下降 ( 上升 ).

Disruptive innovations, however, usually translate into cheaper products with lower profit margins.

而颠覆性创新通常会转化为利润率较低的便宜的产品.

They are in a position to open letters of credit and effect payment in yen.

他们可以开立信用证并且用日元支付.

In this connection , the two sides to require banks secured, open letters of credit.

就此, 双方要求银行作保, 开信用证.

This reflects that Feng Menglong heartily sympathized with these protagonists.

这反映出冯梦龙由衷地同情书中的这些主要人物.