睡不好觉，使人困倦，影响效率和飞行安全，是不言而喻的。
Sleep bad to become aware, make a person Mondayish, affect efficiency and flight safety, it is self-evident.
这个地方的空气，在春天和初夏都非常清新，而现在却变得呆滞和使人困倦了。
The air of the place, so fresh in the spring and early summer, was stagnant and enervating now.
她听到溪水的声音——扯着沙哑的喉咙，昏昏欲睡的老巨人，在轻声低语，含混不清地说着他那使人困倦的幻想。
In her ears was the voice of the stream—a hoarse-throated, sleepy old giant, muttering and mumbling his somnolent fancies.
维生素b1缺乏不仅可引发脚气病，还可引起神经炎并累及心脏，并使人脾气暴躁，困倦乏力，神经过敏，喜怒无常。
Vitamin b1 lack of not only can cause beriberi, can also cause neuropathy and involvement of the heart and make the person grumpy, sleepy weakness, nervous and volatile.
维生素b1缺乏不仅可引发脚气病，还可引起神经炎并累及心脏，并使人脾气暴躁，困倦乏力，神经过敏，喜怒无常。
Vitamin b1 lack of not only can cause beriberi, can also cause neuropathy and involvement of the heart and make the person grumpy, sleepy weakness, nervous and volatile.
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