Reasons to worry: Merapi is capable of producing a Plinian eruption (spewing at least 1 cubic kilometer of magma and producing 20 to 50 kilometer-high ash columns)every 1,000 years or so.
列入关注的理由：默拉皮火山属于普林尼式喷发，大约每千年大规模爆发一次（喷涌而出的岩浆总量可达1立方千米，漫天飞扬的火山灰足有20至50千米高）。
More than 50 subsequent eruptions and the eerie human-shaped cavities left behind in the volcano's ash haven't dissuaded people from populating the slopes of this volcano by the sea.
后来又爆发了50多次，在火山灰里留下的阴森恐怖的人类形状的空洞未能阻止人们仍然居住在海边的火山斜坡上。
Fountains of ash and lava varied from 50 to 100 metres in height.
喷涌而出的火山灰和岩浆，高度从50米到100米不等。
Among which the experiment group using 50% fly ash, 10% silica fume instead of ordinary Portland cement shows rather better durability either in standard curing or the accelerated aging experiment.
其中以粉煤灰50%、硅灰10%取代普通硅酸盐水泥的试验组，无论是试验室标准养护或是加速老化试验都表现出最优的耐久性。
Scraps up to 50% are statistically due to the unqualified molding sand and the main influential factors are sand temperature and amount of dust.
据统计，铸件废品有50％是由于型砂不合格造成的，而砂子温度、含灰量的多少又是影响型砂性能的重要因素。
I read 50 Shades of Grey at least 12 times, and incorporated the fun, frisky stuff from that.
《50度灰》我至少读了12遍，还尝试了书中提到的那些“趣味活动”。
A full-grown grizzly can eat 50 pounds of food a day.
一只完全发育的灰熊，一天可以吃掉50磅的食物。
The change happens most quickly in Caucasians, 50 percent of whom will be at least 50 percent gray by age 50.
这种变化在白种人里面尤其明显，50%的白种人在50岁上下时头发会变灰。
When the lime content is about 9%, the fly ash content about 50% and the steelmaking slag content about 30% in the mixture, this formula has the highest 90-day compression strength.
而粉煤灰掺量对二灰钢渣土的后期抗压强度起主导作用，石灰掺量为9%、粉煤灰掺量为50%、钢渣掺量为30%的配合比90天抗压强度最高。
The main results are as follows:(1) Treated by ultraviolet ray and chemical mutagen, 50 isolates were obtained from isolate BC4's conidial suspension.
以灰葡萄孢BC4为出发菌株，通过紫外线和化学诱变剂诱变分生孢子，共获得50个菌株。
The main results are as follows:(1) Treated by ultraviolet ray and chemical mutagen, 50 isolates were obtained from isolate BC4's conidial suspension.
以灰葡萄孢BC4为出发菌株，通过紫外线和化学诱变剂诱变分生孢子，共获得50个菌株。
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