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The M249 is gas-operated and air-cooled. It has a quick-change barrel, allowing the gunner to rapidly replace an overheated or jammed barrel. A folding bipod is attached near the front of the gun, though a M192 LGM tripod is also available. It can be fed from both linked ammunition and STANAG magazines, like those used in the M16 and M4. This allows the SAW gunner to use rifleman's magazines as an emergency source of ammunition in the event that he runs out of linked rounds. However, this will often cause malfunctions because the magazine spring has difficulty feeding rounds quickly enough to match the SAW's high cyclic rate.

M249采用气动、风冷原理，枪管可快速更换令机枪手在枪管故障或过热时无须浪费时间修理，机枪下前方装有折叠式两脚架，也可使用M192轻机枪的三脚架。M249采用弹链及STANAG弹匣双重供弹，机枪手在断链缺乏弹药等紧急情况时可向装备M16或M4步枪的步兵借用弹匣来射击，但以弹匣供弹时会因弹匣弹簧弹力太大而射速过高及可能出现故障。

These findings show that, contrary to popular belief, tannins are not responsible for the difficulty in pairing red wines with seafood. Instead, monitoring the iron content of wine is the key (unfortunately, there is as yet no way to guess in advance from grape variety or soil which red wines will be iron-free).

这些发现表明，同我们通常的认识相反，单宁酸不是红酒和海鲜搭配困难的原因，而监视酒中铁的含量才是关键（不幸的是，至今还没有办法可以提前根据葡萄种类或者土壤预测哪种红酒是不含铁的）。

The intensity of the magnets in permanent-magnet motors can increase as the motor size and output power increase. This causes difficulty in manufacture of large scale PM motors and consequently increases the cost. Post-assembly magnetization can be treated as a solution to the above problem, which fabricates the motors before the magnet is magnetized by applying large current impulse on the motor stator windings.

中文摘要由於永磁马达转子磁铁强度，会随著马达尺寸与输出功率增加而增加，导致大型永磁马达在制作上，因磁铁的强磁性造成组装上的困难，且易有铁粉等杂物附著，使得制作成本增加，故有必要使用新的充磁技术或特殊制程解决。

The testees'previous mathematics knowledge and the problem's difficulty level have a major effect on sense of self-efficacy in mathematics learning, which ought to be taken into account in the testing .

被试的数学基础和测题的难度对数学学习自我效能感的影响很大，这两个因素也是在自我效能测量中必须要考虑的因素

Build international shipping center and pace of harbor of international container hub as Shanghai accelerate, after house of number of shipping of harbor of Shanghai of pass in and out does not issue be well versed in of channel of deep water of mouth of; the Yangtse River high, boat of pass in and out increasingly incline to is large change, this not only accentuated the workload of pilot, and the difficulty that also added pilotage operation.

随着上海建设国际航运中心和国际集装箱枢纽港步伐的加快，进出上海港船舶数居高不下；长江口深水航道贯通后，进出船型日益趋向大型化，这不但加重了引航员的工作量，而且也增加了引航作业的难度。

In mild cases there may be no more effect than this, but more severe oedema can cause difficulty in breathing.

在温和的情况下，有可能没有更多的效果比这一点，但较严重的水肿可导致呼吸困难，。

The principal reason for both the growth and the lack of accurate measurement is the difficulty in detecting a well-executed theft. Losses per incident thus tend to be higher than in other types of theft.

非法活动增加和缺乏精确测定的主要原因是很难侦查精心实施的偷窃行为，因而每次损失比其他类型的偷窃损失要高。

Obviously, in order to suit the remedy to the case and promote the development of middle and small enterprise, the reason of the financing difficulty must be analyzed in detail.

本文对中小企业融资难这一问题作了较系统的研究，分析了中小企业融资难的现状和原因，并有针对性地提出了解决中小企业融资难的对策。

It is avoid of the businessman on the net " 3 packets " responsibility, nonperformance serves acceptance, after service system is diseased; 4 it is different ground consumption is in the majority, once produce consumptive issue, solve time to grow, handle process loaded down with trivial details; 5 it is to lack significant evidence, shop for instance bill, maintenance log, increased the dimension authority difficulty of consumer; 6 it is to be put in illegal business, after consumer is decieved, contact with distributors reseizure hard, also cannot offer to concerned branch handle a case effectively clew.

三是网上商家规避&三包&责任，不履行服务承诺，售后服务体系不健全；四是异地消费居多，一旦发生消费纠纷，解决时间长，处理过程烦琐；五是缺少有效证据，比如购物发票、维修记录，增加了消费者的维权难度；六是存在非法企业，消费者受骗后难以与销售商再取得联系，也无法向有关部门提供有效办案线索。

Although centrally is released,add a document that receive about the farmer, emphasize further and give kind of grain farmer clearly to fill continuously, grain market is unlocked in the round etc a lot of be helpful for raising kind of grain farmer to produce the enthusiasm, policy sex that is helpful for commissariat commercializing below element stimulation, 2004, productivity of our country grain can get the gender grows resumptive stage by stage, the farmer is planted the enthusiasm of paddy can get rising for certain, but, from statistic of door of Ministry of Agriculture data of intent of paddy seed-corn establish showed 2004, 2004 of paddy cultivate an area to may increase only 1.3%, visible, in short-term inside the yield that should raise our country paddy considerably still has certain difficulty.

虽然在中心发布关于农民增收的一号文件，进一步强调和明确给种粮农民直补、粮食市场全面放开等诸多有利于提高种粮农民生产积极性、有利于粮食市场化的政策性因素刺激下，2004年，我国粮食生产能力会逐步得到恢复性增长，农民种稻的积极性肯定能够得到提高，但是，从农业部门统计的2004年稻谷种植意向数据显示，2004年稻谷的种植面积可能仅增加1.3%，可见，在短期内要大幅提高我国稻谷的产量仍有一定难度。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。